US20080273720A1 - Optimized piezo design for a mechanical-to-acoustical transducer - Google Patents
Optimized piezo design for a mechanical-to-acoustical transducer Download PDFInfo
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- US20080273720A1 US20080273720A1 US11/421,345 US42134506A US2008273720A1 US 20080273720 A1 US20080273720 A1 US 20080273720A1 US 42134506 A US42134506 A US 42134506A US 2008273720 A1 US2008273720 A1 US 2008273720A1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/029—Diaphragms comprising fibres
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
Definitions
- Mechanical-to-acoustical transducers may have one actuator that may be coupled to a speaker membrane or diaphragm that may then be anchored spaced from the actuator. Such a system may provide a diaphragm-type speaker where a display may be viewed through the speaker.
- the actuators may be electro-mechanical, such as electromagnetic, piezoelectric or electrostatic. Piezo actuators do not create a magnetic field that may then interfere with a display image and may also be well suited to transform the high efficiency short linear travel of the piezo motor into a high excusion, piston-equivalent diaphragm movement.
- the present invention relates to an acoustic transducer that coverts a mechanical motion into acoustical energy.
- the acoustic transducer includes a diaphragm and at least one support on at least a portion of the diaphragm.
- At least one actuator may then be provided that is operatively coupled to the diaphragm, wherein the diaphragm or the actuator include one or more areas of reduced stiffness relative to other areas on the diaphragm or actuator.
- the present invention relate to an acoustic transducer that coverts a mechanical motion into acoustical energy.
- the acoustic transducer includes a diaphragm and at least one support on at least a portion of the diaphragm.
- At least one actuator may then be provided that is operatively coupled to the diaphragm, wherein the actuator and the diaphragm have a stiffness, and wherein the diaphragm and the actuator are joined by a material of reduced stiffness relative to the actuator stiffness or the diaphragm stiffness.
- the present invention relates to an acoustic transducer that coverts a mechanical motion into acoustical energy
- the acoustic transducer includes a diaphragm and at least one support on at least a portion of the diaphragm.
- At least one actuator may then be provided that is operatively coupled to the diaphragm, wherein the activator comprises a piezo actuator wherein all or a portion of the actuator, not coupled to said diaphragm, may be restricted in its movement.
- the present invention relates to an acoustic transducer that coverts a mechanical motion into acoustical energy.
- the acoustic transducer includes a diaphragm and at least one support on at least a portion of the diaphragm.
- At least one actuator may then be provided that is operatively coupled to the diaphragm, wherein the actuator includes a substrate that extends outward from the actuator and which supplies an attachment area for coupling to the diaphragm.
- FIG. 1 is a planar view of a mechanical-to-acoustical transducer, coupled to a diaphragm,
- FIG. 2 is an exemplary cross-sectional view illustrating diaphragm flexing.
- FIG. 3 is an exemplary view of an actuator array.
- FIG. 4 is an exemplary view of an actuator in a clamped position.
- FIG. 5 is an exemplary cross-sectional view of an acoustic transducer and diaphragm configuration.
- FIG. 6 is an exemplary cross-sectional view of a piezo actuator.
- FIG. 7 is an exemplary cross-sectional view of a piezo actuator and a portion of an attached diaphragm.
- FIG. 8 is an exemplary cross-sectional view of a piezo actuator and a portion of an attached diaphragm
- FIG. 9 is an exemplary cross-sectional view of a piezo actuator and a diaphragm attached to a support.
- a mechanical-to-acoustical transducer, coupled to a diaphragm, for the purpose of producing audio sound, is disclosed in U.S. Pat. No. 7,038,356, whose teachings are incorporated herein by reference.
- the transducer amounts to a piezo motor coupled to a diaphragm so that the excursion of the actuator is translated into a corresponding, mechanically amplified excursions of the diaphragm.
- the diaphragm may be curved and when optically clear, can be mounted on a frame over a visual display to provide an audio speaker.
- the diaphragm may therefore be characterized by a relatively large, pistonic-equivalent excursion. A typical amplification or mechanical leveraging of the excursion may be five to fifteen fold.
- FIG. 1 illustrates in planar top view an exemplary mechanical-to-acoustical transducer 10 of the present invention.
- two diaphragm channels 12 and 14 may be separated by a relatively inactive zone 16 wherein the membrane may be rigidly engaged to the frame 18 along the horizontal cross-bars of the frame shown generally at 20 .
- the piezo actuators 22 under electrical conditions may produce both a positive and negative motion along the X-axis that produces a corresponding positive and negative pistonic displacement along the Y-axis, by flexing and unflexing the diaphragms 12 and 14 . Since the piezo may be fixed at one end, the motion along the X axis as it is driven produces a mechanical levering.
- FIG. 2 for simplicity, illustrates a mono speaker.
- the piezo actuators 22 may include ceramic material 24 and metallic substrate material 26 .
- the metallic substrate material may include a section that extends outward, as shown generally at 28 and which, as more fully described below, provides relatively more efficient attachment to the diaphragm material.
- one method of optimizing the relative stiffness and response of the driving end of the piezo is to clamp a relatively large section of the piezo, which may then restrict the piezo movement when electrically activated. Such clamping may also be facilitated by use of an adhesive as between the frame and the actuator. As shown in FIG. 4 , by clamping any portion of the surface of the active ceramic, higher output of the piezo can be obtained. As illustrated, about 30-40% of the ceramic has been clamped at region 28 . That is, the piezo is no longer capable of bending about the relatively weaker metallic substrate portion in the clamed region as shown. Accordingly, the force that is applied by the piezo is optimized and increased as delivered to the diaphragm. It has been found that by clamping between 10-75% of the surface of the ceramic, including all values and increments therein, a relatively higher force may occur at the piezo tip (proximate the diaphragm).
- the piezos herein which include a ceramic layer and at least one conductive (metallic) layer on an opposing side may resemble a capacitor in performance. Accordingly, the larger the surface area of the conductive metallic layer may provide a piezo that may retain more charge and provide greater relative output.
- the performance of the piezo may be altered in the event that the conductive electrode layers are selectively applied to the ceramic. For example, if the conductive layer may be applied to the ceramic in a graduated pattern, such would then provide the greatest relative change at the desired location at the piezo tip.
- a relatively large area may be provided for attachment of the piezo to the diaphragm at region 32 .
- a relatively large area may be provided for diaphragm attachment which may more efficiently couple the piezo to the diaphragm.
- the angle of the outwardly projecting substrate from the ceramic may better maintain a desired curvature in the diaphragm by providing a generally tangent attachment location (see again region 32 ) as between a portion of the diaphragm and the outwardly extending piezo substrate material.
- tangent attachment it may be understood that a portion of the surface of the diaphragm may engage with a portion of the surface of the actuator.
- the angle 30 may be in the range of 45-145 degrees, including all increments and values therein.
- FIG. 6 illustrates another form of the piezo that may be employed in the mechanical-to-acoustical transducer of the present invention.
- the piezo substrate may be tapered over its length to again provide for the ability to increase force at the piezo tip.
- the substrate may be tapered and become thinner as one moves away from the clamped zone, shown generally at 29 . Accordingly, the ceramic may then be able to more efficiently bend the relatively thinner substrate than a relatively thicker portion of the substrate resulting in more force at the tip of the piezo that may then be mechanically engaged with the diaphragm. It may therefore be appreciated that one may adjust the thickness of the metal substrate at any location along its length in order to optimize the force vs.
- the metal substrate that extends outwardly towards the diaphragm may itself include an area of reduced thickness 34 which in turn may provide a region of relatively reduced thickness and lower stiffness compared to other sections of such substrate. Such region of reduced thickness may then provide a pivot location as more fully described below.
- area of reduced thickness on the piezo may assume a variety of geometrical shapes, beyond what is illustrated in FIG. 6 .
- FIG. 7 illustrates the configuration wherein the pivot (e.g. region of reduced thickness) 36 may be similarly incorporated directly into the diaphragm. Accordingly, a portion of the diaphragm may be of reduced thickness and provide relatively lower stiffness and a flexure point that allows the diaphragm to pivot about such location when activated by the piezo. Stiffness of the diaphragm or metal substrate of the piezo may be determined by a combination of its material modulus (tensile or flexural) and its cross-section (area moment of inertia). In addition, although the area of reduced thickness 36 is shown as a circular type cut-out, it may again be appreciated that any geometry may be considered to provide reduced thickness or to allow the pivoting as noted herein.
- the pivot e.g. region of reduced thickness
- FIG. 8 illustrates the configuration wherein the pivot may amount to a separate piece of material that connects the piezo and the membrane.
- the material as illustrated, may be of reduced thickness relative to either the metallic piezo substrate material and/or diaphragm material.
- FIG. 9 illustrates that a diaphragm 12 may again be contoured, as shown in cross-section, at those locations wherein it may engage the support 20 or piezo actuator.
- those sections of the diaphragm that may be of reduced thickness would again flex more readily than those sections that are not of such reduced thickness. It may therefore be appreciated that by this technique, one or a plurality of locations on the diaphragm may be thickened or thinned in order to provide increased flexibility at any desired location.
- the advantages that also may be realized are that one may develop a more efficient audio speaker for any given piezo array.
- the diaphragm material being composed of a polymeric type resin, may be prepared such that desired regions of the diaphragm may have different elastic modulus properties (e.g., flexural modulus or “E flex ” as compared to other regions of the diaphragm.
- E flex elastic modulus
- the exposed polymeric material may undergo crosslinking type reactions, thereby increasing the value of E flex in those areas of exposure, relative to those areas that may remain unexposed.
- the diaphragm may also be prepared such that it relies upon different materials at different locations, with varying stiffness characteristics.
Abstract
The present invention relates to an acoustic transducer that coverts a mechanical motion into acoustical energy. The acoustic transducer includes a diaphragm and at least one support on at least a portion of the diaphragm. At least one actuator may then be provided that is operatively coupled to the diaphragm, wherein the diaphragm or the actuator include one or more areas of reduced stiffness relative to other areas on the diaphragm or actuator. In addition, the present invention relates to modifications in actuator design with respect to engagement of the diaphragm and engagement of the actuator with a given support.
Description
- This application claims the benefit of U.S. Provisional Applications Ser. Nos. 60/685,841 and 60/685,842, both filed May 31, 2005, which are incorporated herein by reference. Reference is also made to U.S. application Ser. No. [TBD] entitled “Diaphragm Membrane And Supporting Structure Responsive To Environmental Conditions”, filed simultaneously herewith, whose teachings are also incorporated herein by reference.
- Mechanical-to-acoustical transducers may have one actuator that may be coupled to a speaker membrane or diaphragm that may then be anchored spaced from the actuator. Such a system may provide a diaphragm-type speaker where a display may be viewed through the speaker. The actuators may be electro-mechanical, such as electromagnetic, piezoelectric or electrostatic. Piezo actuators do not create a magnetic field that may then interfere with a display image and may also be well suited to transform the high efficiency short linear travel of the piezo motor into a high excusion, piston-equivalent diaphragm movement.
- In one exemplary embodiment, the present invention relates to an acoustic transducer that coverts a mechanical motion into acoustical energy. The acoustic transducer includes a diaphragm and at least one support on at least a portion of the diaphragm. At least one actuator may then be provided that is operatively coupled to the diaphragm, wherein the diaphragm or the actuator include one or more areas of reduced stiffness relative to other areas on the diaphragm or actuator.
- In another exemplary embodiment the present invention relate to an acoustic transducer that coverts a mechanical motion into acoustical energy. The acoustic transducer includes a diaphragm and at least one support on at least a portion of the diaphragm. At least one actuator may then be provided that is operatively coupled to the diaphragm, wherein the actuator and the diaphragm have a stiffness, and wherein the diaphragm and the actuator are joined by a material of reduced stiffness relative to the actuator stiffness or the diaphragm stiffness.
- In another exemplary embodiment, the present invention relates to an acoustic transducer that coverts a mechanical motion into acoustical energy, The acoustic transducer includes a diaphragm and at least one support on at least a portion of the diaphragm. At least one actuator may then be provided that is operatively coupled to the diaphragm, wherein the activator comprises a piezo actuator wherein all or a portion of the actuator, not coupled to said diaphragm, may be restricted in its movement.
- In another exemplary embodiment, the present invention relates to an acoustic transducer that coverts a mechanical motion into acoustical energy. The acoustic transducer includes a diaphragm and at least one support on at least a portion of the diaphragm. At least one actuator may then be provided that is operatively coupled to the diaphragm, wherein the actuator includes a substrate that extends outward from the actuator and which supplies an attachment area for coupling to the diaphragm.
-
FIG. 1 is a planar view of a mechanical-to-acoustical transducer, coupled to a diaphragm, -
FIG. 2 is an exemplary cross-sectional view illustrating diaphragm flexing. -
FIG. 3 is an exemplary view of an actuator array. -
FIG. 4 is an exemplary view of an actuator in a clamped position. -
FIG. 5 is an exemplary cross-sectional view of an acoustic transducer and diaphragm configuration. -
FIG. 6 is an exemplary cross-sectional view of a piezo actuator. -
FIG. 7 is an exemplary cross-sectional view of a piezo actuator and a portion of an attached diaphragm. -
FIG. 8 is an exemplary cross-sectional view of a piezo actuator and a portion of an attached diaphragm, -
FIG. 9 . is an exemplary cross-sectional view of a piezo actuator and a diaphragm attached to a support. - A mechanical-to-acoustical transducer, coupled to a diaphragm, for the purpose of producing audio sound, is disclosed in U.S. Pat. No. 7,038,356, whose teachings are incorporated herein by reference. In one configuration, the transducer amounts to a piezo motor coupled to a diaphragm so that the excursion of the actuator is translated into a corresponding, mechanically amplified excursions of the diaphragm. The diaphragm may be curved and when optically clear, can be mounted on a frame over a visual display to provide an audio speaker. The diaphragm may therefore be characterized by a relatively large, pistonic-equivalent excursion. A typical amplification or mechanical leveraging of the excursion may be five to fifteen fold.
-
FIG. 1 illustrates in planar top view an exemplary mechanical-to-acoustical transducer 10 of the present invention. As illustrated, twodiaphragm channels inactive zone 16 wherein the membrane may be rigidly engaged to theframe 18 along the horizontal cross-bars of the frame shown generally at 20. With reference toFIG. 2 , thepiezo actuators 22 under electrical conditions may produce both a positive and negative motion along the X-axis that produces a corresponding positive and negative pistonic displacement along the Y-axis, by flexing and unflexing thediaphragms FIG. 2 , for simplicity, illustrates a mono speaker. - As illustrated, along one edge of the two diaphragms may be a number of
piezo actuators 22 which may be discrete or separate actuators or an array of actuators. An exemplary array of such piezo actuators is shown inFIG. 3 . The array of piezo actuators may therefore extend along all or portion of an entire edge of the diaphragm which may in turn allow for the piezo drivers themselves to be conveniently stored on a roll and cut to length depending upon the size of given application (i.e., edge length of a given diaphragm that is being configured for mechanical-to-acoustical engagement). As shown inFIG. 3 thepiezo actuators 22 may includeceramic material 24 andmetallic substrate material 26. In addition, the metallic substrate material may include a section that extends outward, as shown generally at 28 and which, as more fully described below, provides relatively more efficient attachment to the diaphragm material. - In addition, it may be noted that one method of optimizing the relative stiffness and response of the driving end of the piezo, is to clamp a relatively large section of the piezo, which may then restrict the piezo movement when electrically activated. Such clamping may also be facilitated by use of an adhesive as between the frame and the actuator. As shown in
FIG. 4 , by clamping any portion of the surface of the active ceramic, higher output of the piezo can be obtained. As illustrated, about 30-40% of the ceramic has been clamped atregion 28. That is, the piezo is no longer capable of bending about the relatively weaker metallic substrate portion in the clamed region as shown. Accordingly, the force that is applied by the piezo is optimized and increased as delivered to the diaphragm. It has been found that by clamping between 10-75% of the surface of the ceramic, including all values and increments therein, a relatively higher force may occur at the piezo tip (proximate the diaphragm). - In addition, it may be appreciated that the piezos herein which include a ceramic layer and at least one conductive (metallic) layer on an opposing side may resemble a capacitor in performance. Accordingly, the larger the surface area of the conductive metallic layer may provide a piezo that may retain more charge and provide greater relative output. In addition, the performance of the piezo may be altered in the event that the conductive electrode layers are selectively applied to the ceramic. For example, if the conductive layer may be applied to the ceramic in a graduated pattern, such would then provide the greatest relative change at the desired location at the piezo tip. It may therefore be appreciated that by way of such design, apart from improving the output at the piezo tip, the ability to clamp on the active area of the piezo is improved with a reduced possibility of piezo failure, and in addition, by use of a graduated or discontinuous electrode layer, one may tune and optimize the performance of the piezo for a given diaphragm requirement.
- With attention next directed to
FIG. 5 , it can be seen that by extending a portion of the piezo array substrate beyond the ceramic portion and forming and bending it at an angle (see arrow 30), a relatively large area may be provided for attachment of the piezo to the diaphragm atregion 32. By extending thesubstrate 26 outward from the ceramic one may provide two advantages. First, a relatively large area may be provided for diaphragm attachment which may more efficiently couple the piezo to the diaphragm. Secondly, by adjusting the angle of the outwardly projecting substrate from the ceramic one may better maintain a desired curvature in the diaphragm by providing a generally tangent attachment location (see again region 32) as between a portion of the diaphragm and the outwardly extending piezo substrate material. By tangent attachment it may be understood that a portion of the surface of the diaphragm may engage with a portion of the surface of the actuator. Accordingly, in the context of the present invention when the diaphragm may be convex or concave, theangle 30 may be in the range of 45-145 degrees, including all increments and values therein. - Attention is next directed to
FIG. 6 which illustrates another form of the piezo that may be employed in the mechanical-to-acoustical transducer of the present invention. As can be seen, the piezo substrate may be tapered over its length to again provide for the ability to increase force at the piezo tip. As illustrated, the substrate may be tapered and become thinner as one moves away from the clamped zone, shown generally at 29. Accordingly, the ceramic may then be able to more efficiently bend the relatively thinner substrate than a relatively thicker portion of the substrate resulting in more force at the tip of the piezo that may then be mechanically engaged with the diaphragm. It may therefore be appreciated that one may adjust the thickness of the metal substrate at any location along its length in order to optimize the force vs. deflection characteristic of the piezo actuator. In addition, as shown inFIG. 6 the metal substrate that extends outwardly towards the diaphragm may itself include an area of reducedthickness 34 which in turn may provide a region of relatively reduced thickness and lower stiffness compared to other sections of such substrate. Such region of reduced thickness may then provide a pivot location as more fully described below. In addition, such area of reduced thickness on the piezo may assume a variety of geometrical shapes, beyond what is illustrated inFIG. 6 . -
FIG. 7 illustrates the configuration wherein the pivot (e.g. region of reduced thickness) 36 may be similarly incorporated directly into the diaphragm. Accordingly, a portion of the diaphragm may be of reduced thickness and provide relatively lower stiffness and a flexure point that allows the diaphragm to pivot about such location when activated by the piezo. Stiffness of the diaphragm or metal substrate of the piezo may be determined by a combination of its material modulus (tensile or flexural) and its cross-section (area moment of inertia). In addition, although the area of reducedthickness 36 is shown as a circular type cut-out, it may again be appreciated that any geometry may be considered to provide reduced thickness or to allow the pivoting as noted herein. -
FIG. 8 illustrates the configuration wherein the pivot may amount to a separate piece of material that connects the piezo and the membrane. The material, as illustrated, may be of reduced thickness relative to either the metallic piezo substrate material and/or diaphragm material.FIG. 9 illustrates that adiaphragm 12 may again be contoured, as shown in cross-section, at those locations wherein it may engage thesupport 20 or piezo actuator. As can again be appreciated, those sections of the diaphragm that may be of reduced thickness would again flex more readily than those sections that are not of such reduced thickness. It may therefore be appreciated that by this technique, one or a plurality of locations on the diaphragm may be thickened or thinned in order to provide increased flexibility at any desired location. The advantages that also may be realized are that one may develop a more efficient audio speaker for any given piezo array. - In addition, it can be appreciated that the diaphragm material, being composed of a polymeric type resin, may be prepared such that desired regions of the diaphragm may have different elastic modulus properties (e.g., flexural modulus or “Eflex” as compared to other regions of the diaphragm. For example, upon exposure to irradiation (e.g., UV light), the exposed polymeric material may undergo crosslinking type reactions, thereby increasing the value of Eflex in those areas of exposure, relative to those areas that may remain unexposed. In such manner, as opposed to development of a pivot location in the diaphragm be employing areas of reduced thickness, one may develop areas in the diaphragm that may have reduced stiffness relative to other areas of the diaphragm. It is therefore contemplated herein the diaphragm may also be prepared such that it relies upon different materials at different locations, with varying stiffness characteristics.
- The foregoing description is provided to illustrate and explain the present invention. However, the description hereinabove should not be considered to limit the scope of the invention set forth in the claims appended here to.
Claims (12)
1. An acoustic transducer that coverts a mechanical motion into acoustical energy, said acoustic transducer comprising:
a diaphragm;
at least one support on at least a portion of said diaphragm;
at least one actuator operatively coupled to said diaphragm, wherein said diaphragm or said actuator include one or more areas of reduced stiffness relative to other areas on said diaphragm or actuator.
2. The acoustic transducer of claim 1 wherein said diaphragm has a thickness and said area of reduced stiffness includes an area in said diaphragm of reduced thickness.
3. The acoustic transducer of claim 1 wherein said actuator has a thickness and said area of reduced stiffness includes an area in said actuator of reduced thickness.
4. The acoustic transducer of claim 1 wherein both said diaphragm and said actuator include an area of reduced stiffness relative to other areas on said diaphragm and actuator.
5. The acoustic transducer of claim 1 wherein said support overlies a video screen and said diaphragm is spaced from said video screen.
6. An acoustic transducer that coverts a mechanical motion into acoustical energy, said acoustic transducer comprising:
a diaphragm;
at least one support on at least a portion of said diaphragm;
at least one actuator operatively coupled to said diaphragm, wherein said actuator and said diaphragm have a stiffness, and wherein said diaphragm and said actuator are joined by a material of reduced stiffness relative to said actuator stiffness or said diaphragm stiffness.
7. The acoustic transducer of claim 6 wherein said support overlies a video screen and said diaphragm is spaced from said video screen.
8. An acoustic transducer that coverts a mechanical motion into acoustical energy, said acoustic transducer comprising:
a diaphragm;
at least one support on at least a portion of said diaphragm;
at least one actuator operatively coupled to said diaphragm, wherein said activator comprises a piezo actuator wherein all or a portion of said actuator, not coupled to said diaphragm, is restricted in its movement.
9. The acoustic transducer of claim 8 wherein said actuator is restricted in its movement by clamping all or a portion of said actuator.
10. The acoustic transducer of claim 8 wherein said support overlies a video screen and said diaphragm is spaced from said video screen.
11. An acoustic transducer that coverts a mechanical motion into acoustical energy, said acoustic transducer comprising:
a diaphragm;
at least one support on at least a portion of said diaphragm;
at least one actuator operatively coupled to said diaphragm, wherein said actuator includes a substrate that extends outward from the actuator and which supplies an attachment area for coupling to said diaphragm.
12. The acoustic transducer of claim 11 wherein said substrate attachment area for said diaphragm comprises an area for which the diaphragm may tangentially attach to said actuator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/421,345 US20080273720A1 (en) | 2005-05-31 | 2006-05-31 | Optimized piezo design for a mechanical-to-acoustical transducer |
Applications Claiming Priority (3)
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US68584105P | 2005-05-31 | 2005-05-31 | |
US68584205P | 2005-05-31 | 2005-05-31 | |
US11/421,345 US20080273720A1 (en) | 2005-05-31 | 2006-05-31 | Optimized piezo design for a mechanical-to-acoustical transducer |
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US20080273720A1 true US20080273720A1 (en) | 2008-11-06 |
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US11/421,335 Expired - Fee Related US7884529B2 (en) | 2005-05-31 | 2006-05-31 | Diaphragm membrane and supporting structure responsive to environmental conditions |
US11/421,345 Abandoned US20080273720A1 (en) | 2005-05-31 | 2006-05-31 | Optimized piezo design for a mechanical-to-acoustical transducer |
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US11/421,335 Expired - Fee Related US7884529B2 (en) | 2005-05-31 | 2006-05-31 | Diaphragm membrane and supporting structure responsive to environmental conditions |
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EP (2) | EP1886362A2 (en) |
JP (2) | JP2008546315A (en) |
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CA (2) | CA2610483A1 (en) |
WO (2) | WO2006130782A2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140270193A1 (en) * | 2013-03-15 | 2014-09-18 | Emo Labs, Inc. | Acoustic transducers having a connector between an actuator and a diaphragm |
USD733678S1 (en) | 2013-12-27 | 2015-07-07 | Emo Labs, Inc. | Audio speaker |
USD741835S1 (en) | 2013-12-27 | 2015-10-27 | Emo Labs, Inc. | Speaker |
US9232316B2 (en) | 2009-03-06 | 2016-01-05 | Emo Labs, Inc. | Optically clear diaphragm for an acoustic transducer and method for making same |
USD748072S1 (en) | 2014-03-14 | 2016-01-26 | Emo Labs, Inc. | Sound bar audio speaker |
WO2017012787A1 (en) * | 2015-07-22 | 2017-01-26 | Robert Bosch Gmbh | Electroacoustic converter with a travel addition away from the sound direction |
US11076223B2 (en) * | 2019-02-25 | 2021-07-27 | Denso Ten Limited | Speaker device |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4936982B2 (en) * | 2007-05-09 | 2012-05-23 | フォスター電機株式会社 | Flexible display acoustic device |
DE102007041850A1 (en) * | 2007-09-03 | 2009-03-05 | Robert Bosch Gmbh | Ultrasonic sensor with a carrier element and a membrane, wherein the membrane is embedded in the carrier element |
US8068635B2 (en) * | 2008-05-19 | 2011-11-29 | Emo Labs, Inc. | Diaphragm with integrated acoustical and optical properties |
US8340327B2 (en) * | 2009-06-11 | 2012-12-25 | Magna International Inc. | Home theater |
US20110044476A1 (en) * | 2009-08-14 | 2011-02-24 | Emo Labs, Inc. | System to generate electrical signals for a loudspeaker |
KR101122509B1 (en) * | 2010-06-17 | 2012-03-16 | 주식회사 이엠텍 | A sound converting apparatus |
JPWO2014103970A1 (en) * | 2012-12-26 | 2017-01-12 | 京セラ株式会社 | Sound generator, sound generator, electronic equipment |
US20150382110A9 (en) * | 2013-03-14 | 2015-12-31 | Lewis Athanas | Acoustic Transducer and Method for Driving Same |
US20180224937A1 (en) * | 2017-02-09 | 2018-08-09 | Ford Global Technologies, Llc | Input and output device with tactile feedback |
EP3776526A1 (en) | 2018-03-30 | 2021-02-17 | Carrier Corporation | Temperature compensation for piezo sounder |
Citations (76)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2895062A (en) * | 1955-12-22 | 1959-07-14 | Frank R Abbott | Broad band electroacoustic transducer |
US3093710A (en) * | 1959-07-06 | 1963-06-11 | Gulton Ind Inc | Piezoelectric electromechanical transducer |
US3509387A (en) * | 1966-04-22 | 1970-04-28 | Marconi Co Ltd | Electro-mechanical resonators |
US3544201A (en) * | 1968-01-02 | 1970-12-01 | Gen Telephone & Elect | Optical beam deflector |
US4047060A (en) * | 1971-09-07 | 1977-09-06 | Motorola, Inc. | Acoustic transducer with elastomeric coupling |
US4056742A (en) * | 1976-04-30 | 1977-11-01 | Tibbetts Industries, Inc. | Transducer having piezoelectric film arranged with alternating curvatures |
US4088915A (en) * | 1974-02-28 | 1978-05-09 | Pioneer Electronic Corporation | Curved polymeric piezoelectric electro-acoustic transducer |
US4170742A (en) * | 1974-07-15 | 1979-10-09 | Pioneer Electronic Corporation | Piezoelectric transducer with multiple electrode areas |
US4186323A (en) * | 1976-09-21 | 1980-01-29 | International Standard Electric Corporation | Piezoelectric high polymer, multilayer electro-acoustic transducers |
US4352961A (en) * | 1979-06-15 | 1982-10-05 | Hitachi, Ltd. | Transparent flat panel piezoelectric speaker |
US4454386A (en) * | 1980-10-29 | 1984-06-12 | Sumitomo Special Metal Co., Ltd. | Piezoelectric transducer for piezoelectric loud speaker |
US4578613A (en) * | 1977-04-07 | 1986-03-25 | U.S. Philips Corporation | Diaphragm comprising at least one foil of a piezoelectric polymer material |
US4593160A (en) * | 1984-03-09 | 1986-06-03 | Murata Manufacturing Co., Ltd. | Piezoelectric speaker |
US4625138A (en) * | 1984-10-24 | 1986-11-25 | The United States Of America As Represented By The Secretary Of The Army | Piezoelectric microwave resonator using lateral excitation |
US4638207A (en) * | 1986-03-19 | 1987-01-20 | Pennwalt Corporation | Piezoelectric polymeric film balloon speaker |
US4680800A (en) * | 1984-04-24 | 1987-07-14 | Wharfedale Loudspeaker Limited | Moving-coil loudspeaker unit |
US4807294A (en) * | 1986-06-20 | 1989-02-21 | Mitubishi Petrochemical Co., Ltd. | Piezoelectric and foam resin sheet speaker |
US4864624A (en) * | 1988-03-30 | 1989-09-05 | Tichy Thomas H | Piezoelectric loudspeaker with thermal protection |
US4969197A (en) * | 1988-06-10 | 1990-11-06 | Murata Manufacturing | Piezoelectric speaker |
US4979219A (en) * | 1989-03-14 | 1990-12-18 | Lin Kuang Yao | Piezoelectric speakers |
US4992692A (en) * | 1989-05-16 | 1991-02-12 | Hewlett-Packard Company | Annular array sensors |
US5031222A (en) * | 1988-07-22 | 1991-07-09 | Murata Manufacturing Co., Ltd. | Piezoelectric speaker |
US5115472A (en) * | 1988-10-07 | 1992-05-19 | Park Kyung T | Electroacoustic novelties |
US5193119A (en) * | 1985-09-02 | 1993-03-09 | Franco Tontini | Multiple loudspeaker |
US5283835A (en) * | 1991-11-15 | 1994-02-01 | Athanas Lewis S | Ferroelectric composite film acoustic transducer |
US5388160A (en) * | 1991-06-06 | 1995-02-07 | Matsushita Electric Industrial Co., Ltd. | Noise suppressor |
US5428832A (en) * | 1992-03-11 | 1995-06-27 | Matsushita Electric Industrial Co., Ltd. | Noise suppression apparatus |
US5473214A (en) * | 1993-05-07 | 1995-12-05 | Noise Cancellation Technologies, Inc. | Low voltage bender piezo-actuators |
US5524058A (en) * | 1994-01-12 | 1996-06-04 | Mnc, Inc. | Apparatus for performing noise cancellation in telephonic devices and headwear |
US5526421A (en) * | 1993-02-16 | 1996-06-11 | Berger; Douglas L. | Voice transmission systems with voice cancellation |
US5608282A (en) * | 1995-04-19 | 1997-03-04 | The United States Of America As Represented By The Secretary Of The Army | Piezoelectrically controlled superconducting switch |
US5615270A (en) * | 1993-04-08 | 1997-03-25 | International Jensen Incorporated | Method and apparatus for dynamic sound optimization |
US5638456A (en) * | 1994-07-06 | 1997-06-10 | Noise Cancellation Technologies, Inc. | Piezo speaker and installation method for laptop personal computer and other multimedia applications |
US5638454A (en) * | 1991-07-30 | 1997-06-10 | Noise Cancellation Technologies, Inc. | Noise reduction system |
US5642332A (en) * | 1995-10-02 | 1997-06-24 | I/O Exploration Products (U.S.A.), Inc. | Acoustic transducer |
US5652801A (en) * | 1994-05-02 | 1997-07-29 | Aura Systems, Inc. | Resonance damper for piezoelectric transducer |
US5676612A (en) * | 1995-11-28 | 1997-10-14 | Van Doorne's Transmissie B.V. | Pulley |
US5684884A (en) * | 1994-05-31 | 1997-11-04 | Hitachi Metals, Ltd. | Piezoelectric loudspeaker and a method for manufacturing the same |
US5711058A (en) * | 1994-11-21 | 1998-01-27 | General Electric Company | Method for manufacturing transducer assembly with curved transducer array |
US5736808A (en) * | 1995-12-22 | 1998-04-07 | Aura Systems, Inc. | Piezoelectric speaker |
US5751827A (en) * | 1995-03-13 | 1998-05-12 | Primo Microphones, Inc. | Piezoelectric speaker |
US5767612A (en) * | 1994-12-21 | 1998-06-16 | Ngk Insulators, Ltd. | Piezoelectric/electrostrictive film element with a diaphragm having at least one stress releasing end section |
US5780958A (en) * | 1995-11-03 | 1998-07-14 | Aura Systems, Inc. | Piezoelectric vibrating device |
US5802195A (en) * | 1994-10-11 | 1998-09-01 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | High displacement solid state ferroelectric loudspeaker |
US5825902A (en) * | 1995-10-06 | 1998-10-20 | Murata Manufacturing Co., Ltd. | Spherical piezoelectric speaker |
US5828768A (en) * | 1994-05-11 | 1998-10-27 | Noise Cancellation Technologies, Inc. | Multimedia personal computer with active noise reduction and piezo speakers |
US5856956A (en) * | 1996-05-02 | 1999-01-05 | Nec Corporation | Piezoelectric acoustic transducer |
US5867302A (en) * | 1997-08-07 | 1999-02-02 | Sandia Corporation | Bistable microelectromechanical actuator |
US5901231A (en) * | 1995-09-25 | 1999-05-04 | Noise Cancellation Technologies, Inc. | Piezo speaker for improved passenger cabin audio systems |
US5973441A (en) * | 1996-05-15 | 1999-10-26 | American Research Corporation Of Virginia | Piezoceramic vibrotactile transducer based on pre-compressed arch |
US5977688A (en) * | 1997-03-28 | 1999-11-02 | Seiko Instruments R & D Center Inc. | Electronic apparatus for being switched using piezoelectric element |
US6003766A (en) * | 1995-09-02 | 1999-12-21 | New Transducers Limited | Vending machine |
US6023123A (en) * | 1995-05-02 | 2000-02-08 | Hollandse Signaalapparaten B.V. | Acoustic vibration generator |
US6028389A (en) * | 1998-05-26 | 2000-02-22 | The Charles Stark Draper Laboratory, Inc. | Micromachined piezoelectric transducer |
US6031926A (en) * | 1996-09-02 | 2000-02-29 | New Transducers Limited | Panel-form loudspeakers |
US6058196A (en) * | 1990-08-04 | 2000-05-02 | The Secretary Of State For Defense In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Panel-form loudspeaker |
US6064746A (en) * | 1996-06-03 | 2000-05-16 | Murata Manufacturing Co., Ltd. | Piezoelectric speaker |
US6144746A (en) * | 1996-02-09 | 2000-11-07 | New Transducers Limited | Loudspeakers comprising panel-form acoustic radiating elements |
US6188775B1 (en) * | 1995-09-02 | 2001-02-13 | New Transducers Limited | Panel-form loudspeakers |
US6195440B1 (en) * | 1995-11-06 | 2001-02-27 | Noise Cancellation Technologies, Inc. | Piezoelectric transducers |
US6198831B1 (en) * | 1995-09-02 | 2001-03-06 | New Transducers Limited | Panel-form loudspeakers |
US6215881B1 (en) * | 1995-09-02 | 2001-04-10 | New Transducers Limited | Ceiling tile loudspeaker |
US6215882B1 (en) * | 1996-12-11 | 2001-04-10 | The Secretary Of State For Defence | Panel-form loudspeaker |
US6218766B1 (en) * | 1997-06-19 | 2001-04-17 | Noise Cancellation Technologies, Inc. | Loudspeaker assembly |
US6243473B1 (en) * | 1995-09-02 | 2001-06-05 | New Transducers Limited | Laptop computer with loudspeaker(s) |
US6247551B1 (en) * | 1990-08-04 | 2001-06-19 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Panel-form loudspeaker |
US6278790B1 (en) * | 1997-11-11 | 2001-08-21 | Nct Group, Inc. | Electroacoustic transducers comprising vibrating panels |
US20010052627A1 (en) * | 2000-05-09 | 2001-12-20 | Ngk Insulators, Ltd. | Piezoelectric/electrostrictive film type device |
US6472797B1 (en) * | 1999-08-10 | 2002-10-29 | Murata Manufacturing Co., Ltd. | Piezoelectric electro-acoustic transducer |
US6504286B1 (en) * | 1997-12-30 | 2003-01-07 | Remon Medical Technologies Ltd. | Piezoelectric transducer |
US6522760B2 (en) * | 1996-09-03 | 2003-02-18 | New Transducers Limited | Active acoustic devices |
US6617765B1 (en) * | 1999-10-22 | 2003-09-09 | Thales Underwater Systems S.A.S. | Underwater broadband acoustic transducer |
US6720708B2 (en) * | 2000-01-07 | 2004-04-13 | Lewis Athanas | Mechanical-to-acoustical transformer and multi-media flat film speaker |
US7009326B1 (en) * | 1999-10-28 | 2006-03-07 | Murata Manufacturing Co., Ltd. | Ultrasonic vibration apparatus use as a sensor having a piezoelectric element mounted in a cylindrical casing and grooves filled with flexible filler |
US7015624B1 (en) * | 1999-10-22 | 2006-03-21 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Non-uniform thickness electroactive device |
US20070007859A1 (en) * | 2003-09-04 | 2007-01-11 | Lutz Weber | Piezoactuator |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7017070A (en) | 1970-11-21 | 1972-05-24 | ||
JPS5245923A (en) * | 1975-10-09 | 1977-04-12 | Nippon Ceramic Kk | High frequency speaker |
JPS57181298A (en) * | 1981-04-30 | 1982-11-08 | Kyushu Hitachi Maxell Ltd | Piezoelectric ceramic transducer |
FR2542552B1 (en) * | 1983-03-07 | 1986-04-11 | Thomson Csf | ELECTROACOUSTIC TRANSDUCER WITH PIEZOELECTRIC DIAPHRAGM |
JP2617302B2 (en) * | 1987-01-16 | 1997-06-04 | フオスタ−電機株式会社 | Composite speaker |
FR2649575A1 (en) | 1989-07-07 | 1991-01-11 | Thomson Consumer Electronics | Display screen with integrated electroacoustic function |
DE3935909A1 (en) * | 1989-11-01 | 1991-05-02 | Vnii Ochrany Truda I Techniki | SUSPENSION OF VEHICLE SEAT |
JP2576454B2 (en) | 1990-10-01 | 1997-01-29 | 株式会社村田製作所 | Screen combined speaker |
US6151402A (en) * | 1995-09-02 | 2000-11-21 | New Transducers Limited | Vibration transducers |
US5705878A (en) * | 1995-11-29 | 1998-01-06 | Lewis; Aaron | Flat scanning stage for scanned probe microscopy |
JPH1094093A (en) * | 1996-09-17 | 1998-04-10 | Nec Corp | Piezoelectric sound generating body |
US5901213A (en) * | 1996-10-31 | 1999-05-04 | At&T Corp | Method for providing virtual dedicated access to an inter-exchange carrier |
US6108175A (en) * | 1996-12-16 | 2000-08-22 | Seagate Technology, Inc. | Bimorph piezoelectric microactuator head and flexure assembly |
KR20000057689A (en) | 1996-12-20 | 2000-09-25 | 제프리 씨. 제이틀린 | Electroacoustic transducers comprising vibrating panels |
US6060811A (en) * | 1997-07-25 | 2000-05-09 | The United States Of America As Represented By The United States National Aeronautics And Space Administration | Advanced layered composite polylaminate electroactive actuator and sensor |
DE19739594C2 (en) * | 1997-09-10 | 2001-09-06 | Daimler Chrysler Ag | Electrostrictive actuator |
US6181797B1 (en) * | 1999-01-09 | 2001-01-30 | Noise Cancellation Technologies, Inc. | Piezo speaker for improved passenger cabin audio systems |
US6437485B1 (en) * | 2000-12-20 | 2002-08-20 | Piezomotor Uppsala Ab | Double bimorph electromechanical element |
JP3700616B2 (en) * | 2001-06-26 | 2005-09-28 | 株式会社村田製作所 | Piezoelectric electroacoustic transducer and manufacturing method thereof |
US6844657B2 (en) * | 2002-03-14 | 2005-01-18 | Memx, Inc. | Microelectromechanical system and method for producing displacement multiplication |
JP2004066652A (en) * | 2002-08-07 | 2004-03-04 | Ricoh Co Ltd | Liquid droplet jetting head, ink cartridge, and ink jet recorder |
JP4034688B2 (en) * | 2002-08-28 | 2008-01-16 | 富士彦 小林 | Piezoelectric speaker |
JP3951998B2 (en) * | 2003-09-29 | 2007-08-01 | ブラザー工業株式会社 | Liquid transfer device |
JP2007005635A (en) * | 2005-06-24 | 2007-01-11 | Toshiba Corp | Semiconductor device |
US7893599B2 (en) * | 2008-01-29 | 2011-02-22 | Washington State University | Energy converters and associated methods |
-
2006
- 2006-05-31 JP JP2008514826A patent/JP2008546315A/en active Pending
- 2006-05-31 WO PCT/US2006/021311 patent/WO2006130782A2/en active Application Filing
- 2006-05-31 EP EP06771855A patent/EP1886362A2/en not_active Withdrawn
- 2006-05-31 KR KR1020077030674A patent/KR20080080258A/en not_active Application Discontinuation
- 2006-05-31 CA CA002610483A patent/CA2610483A1/en not_active Abandoned
- 2006-05-31 KR KR1020077030665A patent/KR101260543B1/en not_active IP Right Cessation
- 2006-05-31 US US11/421,335 patent/US7884529B2/en not_active Expired - Fee Related
- 2006-05-31 US US11/421,345 patent/US20080273720A1/en not_active Abandoned
- 2006-05-31 JP JP2008514867A patent/JP5064384B2/en not_active Expired - Fee Related
- 2006-05-31 EP EP06771778A patent/EP1886363A2/en not_active Withdrawn
- 2006-05-31 CA CA002610466A patent/CA2610466A1/en not_active Abandoned
- 2006-05-31 WO PCT/US2006/021189 patent/WO2006130731A2/en active Application Filing
Patent Citations (79)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2895062A (en) * | 1955-12-22 | 1959-07-14 | Frank R Abbott | Broad band electroacoustic transducer |
US3093710A (en) * | 1959-07-06 | 1963-06-11 | Gulton Ind Inc | Piezoelectric electromechanical transducer |
US3509387A (en) * | 1966-04-22 | 1970-04-28 | Marconi Co Ltd | Electro-mechanical resonators |
US3544201A (en) * | 1968-01-02 | 1970-12-01 | Gen Telephone & Elect | Optical beam deflector |
US4047060A (en) * | 1971-09-07 | 1977-09-06 | Motorola, Inc. | Acoustic transducer with elastomeric coupling |
US4088915A (en) * | 1974-02-28 | 1978-05-09 | Pioneer Electronic Corporation | Curved polymeric piezoelectric electro-acoustic transducer |
US4170742A (en) * | 1974-07-15 | 1979-10-09 | Pioneer Electronic Corporation | Piezoelectric transducer with multiple electrode areas |
US4056742A (en) * | 1976-04-30 | 1977-11-01 | Tibbetts Industries, Inc. | Transducer having piezoelectric film arranged with alternating curvatures |
US4186323A (en) * | 1976-09-21 | 1980-01-29 | International Standard Electric Corporation | Piezoelectric high polymer, multilayer electro-acoustic transducers |
US4578613A (en) * | 1977-04-07 | 1986-03-25 | U.S. Philips Corporation | Diaphragm comprising at least one foil of a piezoelectric polymer material |
US4352961A (en) * | 1979-06-15 | 1982-10-05 | Hitachi, Ltd. | Transparent flat panel piezoelectric speaker |
US4454386A (en) * | 1980-10-29 | 1984-06-12 | Sumitomo Special Metal Co., Ltd. | Piezoelectric transducer for piezoelectric loud speaker |
US4593160A (en) * | 1984-03-09 | 1986-06-03 | Murata Manufacturing Co., Ltd. | Piezoelectric speaker |
US4680800A (en) * | 1984-04-24 | 1987-07-14 | Wharfedale Loudspeaker Limited | Moving-coil loudspeaker unit |
US4625138A (en) * | 1984-10-24 | 1986-11-25 | The United States Of America As Represented By The Secretary Of The Army | Piezoelectric microwave resonator using lateral excitation |
US5193119A (en) * | 1985-09-02 | 1993-03-09 | Franco Tontini | Multiple loudspeaker |
US4638207A (en) * | 1986-03-19 | 1987-01-20 | Pennwalt Corporation | Piezoelectric polymeric film balloon speaker |
US4807294A (en) * | 1986-06-20 | 1989-02-21 | Mitubishi Petrochemical Co., Ltd. | Piezoelectric and foam resin sheet speaker |
US4864624A (en) * | 1988-03-30 | 1989-09-05 | Tichy Thomas H | Piezoelectric loudspeaker with thermal protection |
US4969197A (en) * | 1988-06-10 | 1990-11-06 | Murata Manufacturing | Piezoelectric speaker |
US5031222A (en) * | 1988-07-22 | 1991-07-09 | Murata Manufacturing Co., Ltd. | Piezoelectric speaker |
US5115472A (en) * | 1988-10-07 | 1992-05-19 | Park Kyung T | Electroacoustic novelties |
US4979219A (en) * | 1989-03-14 | 1990-12-18 | Lin Kuang Yao | Piezoelectric speakers |
US4992692A (en) * | 1989-05-16 | 1991-02-12 | Hewlett-Packard Company | Annular array sensors |
US6247551B1 (en) * | 1990-08-04 | 2001-06-19 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Panel-form loudspeaker |
US6058196A (en) * | 1990-08-04 | 2000-05-02 | The Secretary Of State For Defense In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Panel-form loudspeaker |
US5388160A (en) * | 1991-06-06 | 1995-02-07 | Matsushita Electric Industrial Co., Ltd. | Noise suppressor |
US5638454A (en) * | 1991-07-30 | 1997-06-10 | Noise Cancellation Technologies, Inc. | Noise reduction system |
US5283835A (en) * | 1991-11-15 | 1994-02-01 | Athanas Lewis S | Ferroelectric composite film acoustic transducer |
US5428832A (en) * | 1992-03-11 | 1995-06-27 | Matsushita Electric Industrial Co., Ltd. | Noise suppression apparatus |
US5526421A (en) * | 1993-02-16 | 1996-06-11 | Berger; Douglas L. | Voice transmission systems with voice cancellation |
US5615270A (en) * | 1993-04-08 | 1997-03-25 | International Jensen Incorporated | Method and apparatus for dynamic sound optimization |
US5473214A (en) * | 1993-05-07 | 1995-12-05 | Noise Cancellation Technologies, Inc. | Low voltage bender piezo-actuators |
US5524058A (en) * | 1994-01-12 | 1996-06-04 | Mnc, Inc. | Apparatus for performing noise cancellation in telephonic devices and headwear |
US5652801A (en) * | 1994-05-02 | 1997-07-29 | Aura Systems, Inc. | Resonance damper for piezoelectric transducer |
US5828768A (en) * | 1994-05-11 | 1998-10-27 | Noise Cancellation Technologies, Inc. | Multimedia personal computer with active noise reduction and piezo speakers |
US5684884A (en) * | 1994-05-31 | 1997-11-04 | Hitachi Metals, Ltd. | Piezoelectric loudspeaker and a method for manufacturing the same |
US5638456A (en) * | 1994-07-06 | 1997-06-10 | Noise Cancellation Technologies, Inc. | Piezo speaker and installation method for laptop personal computer and other multimedia applications |
US5802195A (en) * | 1994-10-11 | 1998-09-01 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | High displacement solid state ferroelectric loudspeaker |
US5711058A (en) * | 1994-11-21 | 1998-01-27 | General Electric Company | Method for manufacturing transducer assembly with curved transducer array |
US5767612A (en) * | 1994-12-21 | 1998-06-16 | Ngk Insulators, Ltd. | Piezoelectric/electrostrictive film element with a diaphragm having at least one stress releasing end section |
US5751827A (en) * | 1995-03-13 | 1998-05-12 | Primo Microphones, Inc. | Piezoelectric speaker |
US5608282A (en) * | 1995-04-19 | 1997-03-04 | The United States Of America As Represented By The Secretary Of The Army | Piezoelectrically controlled superconducting switch |
US6023123A (en) * | 1995-05-02 | 2000-02-08 | Hollandse Signaalapparaten B.V. | Acoustic vibration generator |
US6188775B1 (en) * | 1995-09-02 | 2001-02-13 | New Transducers Limited | Panel-form loudspeakers |
US6198831B1 (en) * | 1995-09-02 | 2001-03-06 | New Transducers Limited | Panel-form loudspeakers |
US6215881B1 (en) * | 1995-09-02 | 2001-04-10 | New Transducers Limited | Ceiling tile loudspeaker |
US6003766A (en) * | 1995-09-02 | 1999-12-21 | New Transducers Limited | Vending machine |
US6243473B1 (en) * | 1995-09-02 | 2001-06-05 | New Transducers Limited | Laptop computer with loudspeaker(s) |
US5901231A (en) * | 1995-09-25 | 1999-05-04 | Noise Cancellation Technologies, Inc. | Piezo speaker for improved passenger cabin audio systems |
US6215884B1 (en) * | 1995-09-25 | 2001-04-10 | Noise Cancellation Technologies, Inc. | Piezo speaker for improved passenger cabin audio system |
US5642332A (en) * | 1995-10-02 | 1997-06-24 | I/O Exploration Products (U.S.A.), Inc. | Acoustic transducer |
US5825902A (en) * | 1995-10-06 | 1998-10-20 | Murata Manufacturing Co., Ltd. | Spherical piezoelectric speaker |
US5780958A (en) * | 1995-11-03 | 1998-07-14 | Aura Systems, Inc. | Piezoelectric vibrating device |
US6195440B1 (en) * | 1995-11-06 | 2001-02-27 | Noise Cancellation Technologies, Inc. | Piezoelectric transducers |
US5676612A (en) * | 1995-11-28 | 1997-10-14 | Van Doorne's Transmissie B.V. | Pulley |
US5736808A (en) * | 1995-12-22 | 1998-04-07 | Aura Systems, Inc. | Piezoelectric speaker |
US6144746A (en) * | 1996-02-09 | 2000-11-07 | New Transducers Limited | Loudspeakers comprising panel-form acoustic radiating elements |
US5856956A (en) * | 1996-05-02 | 1999-01-05 | Nec Corporation | Piezoelectric acoustic transducer |
US5973441A (en) * | 1996-05-15 | 1999-10-26 | American Research Corporation Of Virginia | Piezoceramic vibrotactile transducer based on pre-compressed arch |
US6064746A (en) * | 1996-06-03 | 2000-05-16 | Murata Manufacturing Co., Ltd. | Piezoelectric speaker |
US6031926A (en) * | 1996-09-02 | 2000-02-29 | New Transducers Limited | Panel-form loudspeakers |
US6522760B2 (en) * | 1996-09-03 | 2003-02-18 | New Transducers Limited | Active acoustic devices |
US6215882B1 (en) * | 1996-12-11 | 2001-04-10 | The Secretary Of State For Defence | Panel-form loudspeaker |
US5977688A (en) * | 1997-03-28 | 1999-11-02 | Seiko Instruments R & D Center Inc. | Electronic apparatus for being switched using piezoelectric element |
US6218766B1 (en) * | 1997-06-19 | 2001-04-17 | Noise Cancellation Technologies, Inc. | Loudspeaker assembly |
US5867302A (en) * | 1997-08-07 | 1999-02-02 | Sandia Corporation | Bistable microelectromechanical actuator |
US6278790B1 (en) * | 1997-11-11 | 2001-08-21 | Nct Group, Inc. | Electroacoustic transducers comprising vibrating panels |
US6720709B2 (en) * | 1997-12-30 | 2004-04-13 | Remon Medical Technologies Ltd. | Piezoelectric transducer |
US6504286B1 (en) * | 1997-12-30 | 2003-01-07 | Remon Medical Technologies Ltd. | Piezoelectric transducer |
US6028389A (en) * | 1998-05-26 | 2000-02-22 | The Charles Stark Draper Laboratory, Inc. | Micromachined piezoelectric transducer |
US6472797B1 (en) * | 1999-08-10 | 2002-10-29 | Murata Manufacturing Co., Ltd. | Piezoelectric electro-acoustic transducer |
US6617765B1 (en) * | 1999-10-22 | 2003-09-09 | Thales Underwater Systems S.A.S. | Underwater broadband acoustic transducer |
US7015624B1 (en) * | 1999-10-22 | 2006-03-21 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Non-uniform thickness electroactive device |
US7009326B1 (en) * | 1999-10-28 | 2006-03-07 | Murata Manufacturing Co., Ltd. | Ultrasonic vibration apparatus use as a sensor having a piezoelectric element mounted in a cylindrical casing and grooves filled with flexible filler |
US6720708B2 (en) * | 2000-01-07 | 2004-04-13 | Lewis Athanas | Mechanical-to-acoustical transformer and multi-media flat film speaker |
US7038356B2 (en) * | 2000-01-07 | 2006-05-02 | Unison Products, Inc. | Mechanical-to-acoustical transformer and multi-media flat film speaker |
US20010052627A1 (en) * | 2000-05-09 | 2001-12-20 | Ngk Insulators, Ltd. | Piezoelectric/electrostrictive film type device |
US20070007859A1 (en) * | 2003-09-04 | 2007-01-11 | Lutz Weber | Piezoactuator |
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US9232316B2 (en) | 2009-03-06 | 2016-01-05 | Emo Labs, Inc. | Optically clear diaphragm for an acoustic transducer and method for making same |
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US9094743B2 (en) | 2013-03-15 | 2015-07-28 | Emo Labs, Inc. | Acoustic transducers |
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CN105228757A (en) * | 2013-03-15 | 2016-01-06 | 埃莫实验室公司 | There is the sonic transducer of bending limiting part |
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US20150326977A1 (en) * | 2013-03-15 | 2015-11-12 | Emo Labs, Inc. | Acoustic transducers with bend limiting member |
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USD733678S1 (en) | 2013-12-27 | 2015-07-07 | Emo Labs, Inc. | Audio speaker |
USD741835S1 (en) | 2013-12-27 | 2015-10-27 | Emo Labs, Inc. | Speaker |
USD748072S1 (en) | 2014-03-14 | 2016-01-26 | Emo Labs, Inc. | Sound bar audio speaker |
WO2017012787A1 (en) * | 2015-07-22 | 2017-01-26 | Robert Bosch Gmbh | Electroacoustic converter with a travel addition away from the sound direction |
US11076223B2 (en) * | 2019-02-25 | 2021-07-27 | Denso Ten Limited | Speaker device |
Also Published As
Publication number | Publication date |
---|---|
JP2008546315A (en) | 2008-12-18 |
US7884529B2 (en) | 2011-02-08 |
KR20080080257A (en) | 2008-09-03 |
WO2006130731A3 (en) | 2007-04-19 |
CA2610483A1 (en) | 2006-12-07 |
WO2006130782A3 (en) | 2007-10-25 |
WO2006130782A2 (en) | 2006-12-07 |
US20060269087A1 (en) | 2006-11-30 |
JP5064384B2 (en) | 2012-10-31 |
KR101260543B1 (en) | 2013-05-06 |
EP1886363A2 (en) | 2008-02-13 |
WO2006130731A2 (en) | 2006-12-07 |
EP1886362A2 (en) | 2008-02-13 |
JP2008546319A (en) | 2008-12-18 |
CA2610466A1 (en) | 2006-12-07 |
KR20080080258A (en) | 2008-09-03 |
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