CN104378703A - Fixing device for miniature microphone used for picking up double-ear sound pressure and manufacturing method thereof - Google Patents
Fixing device for miniature microphone used for picking up double-ear sound pressure and manufacturing method thereof Download PDFInfo
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- CN104378703A CN104378703A CN201410434424.9A CN201410434424A CN104378703A CN 104378703 A CN104378703 A CN 104378703A CN 201410434424 A CN201410434424 A CN 201410434424A CN 104378703 A CN104378703 A CN 104378703A
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Abstract
The invention discloses a fixing device for a miniature microphone used for picking up double-ear sound pressure. The fixing device for the miniature microphone used for picking up the double-ear sound pressure comprises a fixing device body. The outline of the fixing device body fits the shape of a section of the auditory meatus from the auditory meatus opening to the second bend of the auditory meatus. A microphone via hole matched with the miniature microphone is formed in the middle of the fixing device body and used for mounting and fixing the miniature microphone. A wiring channel used for leading out signal lines of the miniature microphone outside the earhole is formed in the edge of the fixing device body. The invention further discloses a manufacturing method of the fixing device. According to the fixing device for the miniature microphone used for picking up the double-ear sound pressure and the manufacturing method of the fixing device, the miniature microphone used for picking up the double-ear sound pressure can be arranged in the auditory meatus opening safely and stably, the sealing effect is better, and the measurement repeatability of double-ear sound pressure data is improved.
Description
Technical field
The present invention relates to the field of measuring technique of audible sound, particularly relate to the micro microphone fixture and manufacture method picked up for ears acoustic pressure.
Background technology
It is a widely used technology that ears acoustic pressure is picked up, refer to the ears place placement microphone true man or dummy head, record the sound pressure signal at ears place, can be used for the research of indoor auralization, sound programme makes, the fields such as head-position difficult labor (HRTF) measurement.According to the difference of microphone modes of emplacement, the ear canal method of measurement picking up duct voice pressure can be divided into, and pick up the clinical measurement method of acoustic pressure near membranae tympani aures unitae, and the method by miniature acceleration sensor indirect inspection ears acoustic pressure in the middle part of duct proposed recently.
Comparatively speaking, ear canal method is safer, can use under general experimental situation and operate, not need the assistance of clinical technique personnel; But because the placement of microphone is more difficult, particularly the repeatability of microphone position is bad, thus affect the repeatability that ears acoustic pressure picks up.
Ear canal method more common in the measurement of HRTF database [Xie B. S., Zhong X. L.,
et al, 2007].But because the sound source of HRTF Database Requirements to different directions and different distance is measured, its measuring period is general longer.When micro microphone is placed built on the sand at duct mouth, easily loosen in long measuring process and even depart from, thus the acoustic pressure of duct mouth is picked up receive impact.
Specifically, when ear canal method places micro microphone, following problem is faced:
(1) placement of micro microphone is different from earphone, and the radiating surface of earphone is inside duct, and wire moves towards outside duct naturally, thus easily places; Micro microphone is then different, needs by the vibrating diaphragm of micro microphone outside duct mouth, thus causes holding wire needs to be drawn after lateral buckling in duct.The holding wire of bending easily causes micro microphone to loosen, thus causes above-mentioned measurement reproducibility problem.
(2) when measuring ears acoustic pressure (or measuring HRTF) of true man experimenter's duct mouth, the duct mouth-shaped of each experimenter is not identical with size, if adopt general method, when such as wrapping up the wire of micro microphone and bending thereof with rubber ring or adhesive plaster, the duct of different experimenter can not be adapted to; If repeatedly repaired simple fixed form in measuring process, such as change rubber ring or adhesive plaster, easily damage micro microphone, and measurement data poor stability.
(3) micro microphone is various in style, when selecting different micro microphones, if micro microphone mates preferably with the microphone via hole of fixture, better ear canal effect can be reached, reduce the impact that low frequency leakage etc. is picked up ear canal method ears acoustic pressure.
Summary of the invention
The object of the invention is to, overcome the problem of the above-mentioned fixing micro microphone faced when duct mouth picks up ears acoustic pressure, a kind of ear canal shapes of simulating is provided, and there is the micro microphone fixture of personalized resemblance, thus improve stability and the precision that ears acoustic pressure picks up data.
To achieve the above object, the present invention adopts following technical scheme:
For the micro microphone fixture that ears acoustic pressure is picked up, comprise fixture body, the contour mimicry of described fixture body is from duct mouth to one section of ear canal shapes of duct second bend; The microphone via hole mated with micro microphone is provided with, for installing and fixing micro microphone in the middle of described fixture body; Described fixture body edges, is provided with to draw the holding wire of micro microphone to the trough outside earhole.
Further, described fixture body stretches into one end semicircular in shape in duct.
Further, one end that described fixture body is positioned at duct mouth is provided with draught line.
For the manufacture method of the micro microphone fixture that ears acoustic pressure is picked up, comprise step:
1) make ear sample: along duct mouth toward eardrum direction, until account for duct second bend of 2/3 of ear canal length, make ear sample with flexible material;
2) cut ear sample: will the ear sample perpendicular cuts at duct mouth place be positioned at, will the ear sample perpendicular cuts at 2-3mm place outside distance duct second bend be positioned at;
3) polishing ear sample: the ear sample edge after cutting is polished smooth;
4) wax: use red wax to be about the thick wax of 0.5mm for ear sample last layer, ear sample surface is polished;
5) reverse mould: medical agar is heated to about 40 DEG C and makes ear mould to dissolving rear reverse mould;
6) shaping: use hypo-allergenic photo-curing material and ear mould to make fixture body, the one end being positioned at duct mouth at fixture body arranges draught line, so that the dismounting of ear sample;
7) polishing fixture body: the coarse part of fixture body or cutting corner are polished smooth;
8) polishing: the part of polishing is carried out polishing with buff and buffing wax, makes fixture body become glossy clear;
9) punch: the processing microphone via hole in the middle of fixture body according to micro microphone profile and size;
10) trough 4 is made: according to micro microphone signal linear dimension at fixture body edges processing trough.
relative to prior art, advantage of the present invention and beneficial effect are:
1, compared with the micro microphone fixture picked up with general ear canal method ears acoustic pressure, owing to simulating the resemblance of personalized ear canal shapes, make the fixture of micro microphone more stable.
2, compared with the micro microphone fixture picked up with general ear canal method ears acoustic pressure, owing to being according to material object customization according to microphone via hole and holding wire trough, thus better ear canal effect can be obtained.
Accompanying drawing explanation
Fig. 1 is the schematic front view of the embodiment of the present invention.
Fig. 2 is the cross-sectional schematic of the embodiment of the present invention.
The implementation result schematic diagram of Fig. 3 embodiment of the present invention.
In figure: 1-fixture body 1; 2-draught line; 3-microphone via hole; 4-trough; 5-eardrum; 6-duct mouth; 7-duct second bend.
Embodiment
Be described in further detail goal of the invention of the present invention below in conjunction with the drawings and specific embodiments, embodiment can not repeat one by one at this, but therefore embodiments of the present invention are not defined in following examples.
Embodiment 1
As shown in Figures 1 and 2, for the micro microphone fixture that ears acoustic pressure is picked up, comprise fixture body 1, trough 4, the contour mimicry of described fixture body 1 is from one section of ear canal shapes of duct mouth 6 to duct second bend 7; The microphone via hole 3 mated with micro microphone is provided with, for installing and fixing micro microphone in the middle of described fixture body 1; Described fixture body 1 edge, is provided with to draw the holding wire of micro microphone to the trough 4 outside earhole.
Described fixture body 1 stretches into one end semicircular in shape in duct, is convenient to insert duct.
During use, the present embodiment is inserted in duct, the contour mimicry of fixture body 1 shape of duct, and the holding wire of micro microphone is arranged in trough 4, make the fixture of micro microphone more stable, better ear canal effect can be obtained, simultaneously, one end that described fixture body 1 is positioned at duct mouth is provided with draught line 2, is convenient to micro microphone fixture from duct from extracting.
Embodiment 2:
For the manufacture method of the micro microphone fixture that ears acoustic pressure is picked up, comprise step:
1) ear sample is made: along duct mouth 6 toward eardrum 5 direction, until account for ear canal length d
12/3 duct second bend 7, make ear sample (see figure 3) with flexible material;
2) cut ear sample: will be positioned at the ear sample perpendicular cuts at duct mouth 6 place, will be positioned at the ear sample perpendicular cuts at 2-3mm place outside distance duct second bend 7, as shown in Figure 3, ear sample length is d
2;
3) polishing ear sample: the ear sample edge after cutting is polished smooth;
4) wax: use red wax to be about the thick wax of 0.5mm for ear sample last layer, ear sample surface is polished;
5) reverse mould: medical agar is heated to about 40 DEG C and makes ear mould to dissolving rear reverse mould;
6) shaping: use hypo-allergenic photo-curing material and ear mould to make fixture body 1, the one end being positioned at duct mouth at fixture body 1 arranges draught line 2, so that the dismounting of ear sample;
7) polishing fixture body 1: the coarse part of fixture body 1 or cutting corner are polished smooth;
8) polishing: the part of polishing is carried out polishing with buff and buffing wax, makes fixture body 1 become glossy clear;
9) punch: processing microphone via hole (3) in the middle of fixture body 1 according to micro microphone profile and size;
10) trough 4 is made: according to micro microphone signal linear dimension at fixture body 1 edge processing trough 4.
From above-mentioned example, the micro microphone arrangement that ear canal method ears acoustic pressure according to the present invention is picked up, the distance adjustment that Head-Related Transfer Function for Nearby Sources is measured can be met, coordinate system precision is high, the origin of coordinates is clear and definite, reach the object of expection, solve an auditory localization difficult problem near field head associated transport measuring system.This invention is also applicable to other electroacoustic application scenario will be strict with sound source locus.
The above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection range that all should be included in the claims in the present invention.
Claims (4)
1. for the micro microphone fixture that ears acoustic pressure is picked up, it is characterized in that, comprise fixture body (1), the contour mimicry of described fixture body (1) from duct mouth (6) to duct second bend (7) near one section of ear canal shapes; The microphone via hole (3) mated with micro microphone is provided with, for installing and fixing micro microphone in the middle of described fixture body (1); Described fixture body (1) edge, is provided with to draw the holding wire of micro microphone to the trough (4) outside earhole.
2. the micro microphone fixture picked up for ears acoustic pressure according to claim 1, is characterized in that, described fixture body (1) stretches into one end semicircular in shape in duct.
3. the micro microphone fixture picked up for ears acoustic pressure according to claim 2, is characterized in that, one end that described fixture body (1) is positioned at duct mouth is provided with draught line (2).
4. the manufacture method of the micro microphone fixture picked up for ears acoustic pressure, is characterized in that, comprise step:
1) make ear sample: along duct mouth (6) toward eardrum (5) direction, until account for duct second bend (7) of 2/3 of ear canal length, make ear sample with flexible material;
2) cut ear sample: the ear sample perpendicular cuts that will be positioned at duct mouth (6) place, the ear sample perpendicular cuts at 2-3mm place, distance duct second bend (7) outside will be positioned at;
3) polishing ear sample: the ear sample edge after cutting is polished smooth;
4) wax: use red wax to be about the thick wax of 0.5mm for ear sample last layer, ear sample surface is polished;
5) reverse mould: medical agar is heated to about 40 DEG C and makes ear mould to dissolving rear reverse mould;
6) shaping: to use hypo-allergenic photo-curing material and ear mould to make fixture body (1), the one end being positioned at duct mouth at fixture body (1) arranges draught line (2), so that the dismounting of ear sample;
7) polishing fixture body (1): the coarse part of fixture body (1) or cutting corner are polished smooth;
8) polishing: the part of polishing is carried out polishing with buff and buffing wax, makes fixture body 1 become glossy clear;
9) punch: (in the middle of 1, process microphone via hole (3) according to micro microphone profile and size at fixture body;
10) trough 4 is made: according to micro microphone signal linear dimension at fixture body 1 edge processing trough (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410434424.9A CN104378703A (en) | 2014-08-29 | 2014-08-29 | Fixing device for miniature microphone used for picking up double-ear sound pressure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410434424.9A CN104378703A (en) | 2014-08-29 | 2014-08-29 | Fixing device for miniature microphone used for picking up double-ear sound pressure and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN104378703A true CN104378703A (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410434424.9A Pending CN104378703A (en) | 2014-08-29 | 2014-08-29 | Fixing device for miniature microphone used for picking up double-ear sound pressure and manufacturing method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483298A (en) * | 2000-12-20 | 2004-03-17 | Method and apparatus for determining in situ the acoustic seal provided by an in-ear device | |
| US20060045297A1 (en) * | 2004-08-25 | 2006-03-02 | Phonak Ag | Earplug and method for manufacturing the same |
| CN202172480U (en) * | 2011-08-11 | 2012-03-21 | 王华力 | Customized earphone |
| CN204069245U (en) * | 2014-08-29 | 2014-12-31 | 华南理工大学 | For the micro microphone fixture that ears acoustic pressure is picked up |
-
2014
- 2014-08-29 CN CN201410434424.9A patent/CN104378703A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483298A (en) * | 2000-12-20 | 2004-03-17 | Method and apparatus for determining in situ the acoustic seal provided by an in-ear device | |
| US20060045297A1 (en) * | 2004-08-25 | 2006-03-02 | Phonak Ag | Earplug and method for manufacturing the same |
| CN202172480U (en) * | 2011-08-11 | 2012-03-21 | 王华力 | Customized earphone |
| CN204069245U (en) * | 2014-08-29 | 2014-12-31 | 华南理工大学 | For the micro microphone fixture that ears acoustic pressure is picked up |
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Application publication date: 20150225 |
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