CA2352346C - Hearing aid - Google Patents

Hearing aid Download PDF

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Publication number
CA2352346C
CA2352346C CA2352346A CA2352346A CA2352346C CA 2352346 C CA2352346 C CA 2352346C CA 2352346 A CA2352346 A CA 2352346A CA 2352346 A CA2352346 A CA 2352346A CA 2352346 C CA2352346 C CA 2352346C
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CA
Canada
Prior art keywords
peripherals
signal processing
hearing aid
processing unit
interfaces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA2352346A
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French (fr)
Other versions
CA2352346A1 (en
Inventor
Herbert Bachler
Christian Berg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sonova Holding AG
Original Assignee
Phonak AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Phonak AG filed Critical Phonak AG
Publication of CA2352346A1 publication Critical patent/CA2352346A1/en
Application granted granted Critical
Publication of CA2352346C publication Critical patent/CA2352346C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/60Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/30Monitoring or testing of hearing aids, e.g. functioning, settings, battery power
    • H04R25/305Self-monitoring or self-testing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/65Housing parts, e.g. shells, tips or moulds, or their manufacture
    • H04R25/658Manufacture of housing parts
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/70Adaptation of deaf aid to hearing loss, e.g. initial electronic fitting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/50Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505Customised settings for obtaining desired overall acoustical characteristics using digital signal processing

Abstract

The invention relates to a hearing aid with a central signal processing unit (1). Said central signal processing unit (1) interacts with peripheral units (3E, 3A) on the input and output side. Said peripheral units each have an identification unit (5) whose output interacts with the input of a comparing unit (9). The comparing unit (9) in turn interacts with identification-possibility memory units (11), and acts on a configuration storage unit (15) on the output side. In this way, the hearing aid configuration can identify itself using the peripheral units.

Description

r CA 02352346 2001-05-23 HEARING AID
The present invention relates to a hearing aid defined in the preamble of claim 1 and to a method, defined in the preamble of claim 9, for manufacturing a hearing aid.
s Hearing aids are exceedingly complex systems. To meet a user's particular needs, a large number of different variations of hardware configurations must be made available. As a result manufacture, marketing and hearing-aid fitting incur very high costs, for instance manufacture requires setting up numerous different hearing-aid configurations which must be appropriately labeled and monitored and marketing requires commensurate stocking, while to hearing-aid fitting must match the user's particular needs and different procedures are required depending on the particular hearing-aid configurations.
Starting with a hearing aid of the above cited kind, it is the objective of the present invention to solve this problem. For that purpose, at least some of the peripherals shall comprise an identifying unit of which the output is connected to the input of a comparator. An is identification memory is connected to the input of said comparator. At its output, the comparator drives a configuration memory.
Because at least some, preferably all peripherals identify themselves and because the comparator - on the basis of the incoming identifications from the peripherals and following comparison with several possibilities of connecting such peripherals -- shall store such a 2o particular hardware configuration, the following significant advantages are attained:
Once assembled, the hearing aid is self-identifying in that by means of the comparator it has ascertained its configuration in terms of peripherals.
Because this self-identification requiring no writing -- for instance on the packaging --circumvents sources of errors in production quality controls, in marketing and fitting the hearing 2s aids, it being impossible to test, deliver or fit a hearing aid that would be of another peripheral configuration.
In a preferred embodiment of the present invention, the comparatoroutput is connected to an operationally selective input at the signal processing unit. As a result only such processing is feasible at the signal processing unit -- whether for operational purposes per se or already for implementation -- which also are admissible for the actual system constellation s at hand. Operational programs which for instance must be implemented in wireless manner can be tested in this way for the admissibility of the predominant system constellation.
A further preferred embodiment of the hearing aid of the invention sets up the connection between peripherals and the central signal processor by means of a bus and interfaces. It is clear that in a conventional hearing aid the central digital processing unit must io be connected hardware to hardware to the particular peripherals. The more options there are regarding the peripherals, the more connections must be provided for the central processing unit. This number increasingly affects the required chip area of the cited signal processing unit, and this feature is exceedingly disadvantageous in the desired miniaturization of hearing aids. Because the cited connections take place through a bus and interfaces, it is feasible to ~s minimize the number of those hardware connections which are used in the hardware configuration of the state of the art, and the signals applied to said connections can be recognized and interpreted in configuration-specific manner by the signal processing unit.
Applicable peripherals include microphones etc, sensors in general, loudspeakers etc., actuators in general, transceivers, i.e. wireless transmitters and/or receivers, manually 20 operated selection switches, loudspeaker volume controls (potentiometers), read-only memories for instance processing parameters for the signal processing unit, read/write memories for instance for processing protocols, etc.
These peripherals can be generically divided into a first category of audio signal components such as sensors, actuators, amplifiers, filters and into a second category of 2s control components such as transceivers, selection switches, memories etc.
Preferably a first bus with first interfaces is used for the first category and a second bus with second interfaces is used for the second category. In a further preferred mode, the first interfaces are designed as at least three-wire interfaces, the second interfaces are designed as at least two-wire interfaces. Appropriate interfaces on one hand are 12S as three-wire interfaces and 12C as two-wire interfaces, both marketed by Philips.
In principle however the hookup of signal-processing-unit/bus/peripherals also can be implemented by means of other interfaces, for instance AES-3 interfaces from the Audio Engineering Society and/or SPI Motorola interfaces.
The actual configuration also determines which signals are being transmitted to the to central processing unit and hence which parameters. If peripheral identification is automated at the hearing aid of the invention, it will also be possible to automatically activate those signal processing configurations from a plurality of such which do correspond to the prevailing configuration with peripherals, or to drive them externally for instance using a transceiver, that is in wireless manner. As a result the problem of hearing-aid signal processing which does is not at all correspond to the present configuration including peripherals shall be eliminated.
In a further preferred embodiment, the hearing aid of the invention comprises an output connected to the configuration memory at the hearing aid. In this way it is feasible -- when hooking up the hearing aid to a computer-assisted fitting apparatus -- that the hearing aid in its present configuration shall call up said apparatus and identify itself, whereby errors caused 2o by erroneous hearing-aid assumptions shall be excluded. This communication as well may be wireless in that the cited output is provided~by a transceiver.
A method of the invention for manufacturing a hearing aid is defined by the features of claim 10. Further preferred implementations of the manufacturing method of the invention are specified in the further claims.
2s The invention is elucidated below in relation to the attached drawings.
Fig. 1 is a signal-flow/functional-block diagram showing the basic principle of the hearing aid of the invention, Fig. 2 shows a preferred design of the hearing aid of the invention, and Fig. 3 shows a preferred embodiment of the invention's hearing aid designed as in Fig.
s 2.
As shown in Fig. 1, a hearing aid of the invention comprises a central digital signal processing unit 1 having signal inputs E and signal outputs A. Peripherals 3E
and 3A are connected to the signal inputs and outputs E and A. The peripherals 3E for instance may be sensors such as microphones, more generally acoustic/electric transducers, or control units to such as a remote control with transceiver, program switches, a loudspeaker volume adjustment etc. As regards the peripheral 3A, in particular actuators may be involved such as one or several electric/mechanical or electric/electric output transducers.
As shown in Fig. 1, at least one peripheral 3E is provided at the input side and at least one peripheral 3A at the output side of the signal processing unit 1. Digital andlor analogue is inputs with subsequent analog/digital converters (omitted) are present atthe central processing unit in relation to the signals transmitted by the peripherals 3E. In similar manner digital outputs and/or analogue outputs preceded by digital/analog converters are present at the output side of said unit 1 in relation to the signals processed by the peripheral 3A.
Each of the minimum of two peripherals 3 comprises an identification memory 5.
The 2o information stored in the identification memories 5 is highly specific to the kind of peripheral involved, for instance the kind of microphone, remote control etc.
Following hardware configuration of the hearing aid, an identification cycle begins.
Therein, and as schematically indicated by the cycle unit 7, illustratively all identification memories 5 are searched sequentially and an appropriate determination is made that no is peripherals are hooked up to the dummy connection 5~. The unit 7 feeds the memory contents of the identification memories 5 to a comparator 9. All peripherals appropriate for the signal processing unit 1 together with their pertinent identifications are entered in a read-only memory 11.
To make sure that the signal processing unit 1 and the read-only memory 11 also correspond to each other in the sense that the memory 11 in fact does contain identification s features of peripherals which also match the particular signal processing unit 1, the first step in identification may be in comparing an identification entry stored in an identification memory 5 of the signal processing unit 1 - 7 and the comparator 9 with the contents deposited at the read-only memory 11 in its own identification memory 5", and identifying this memory or contents.
to As schematically indicated by the circulating unit 13, a sequential determination takes place at the comparator 9, by means of the entries in the identification memories 5 which of the kinds of peripherals 3 previously stored in the read-only memory 11 are at all present in the hearing-aid under consideration, and which are not. If there is a model X
signal processing unit 1, and peripherals of types M and N are called for, then the output of the comparator is stores the hearing aid configuration X, M, N in a hearing-aid configuration memory 15, and, as shown in relation to the read-only memory 11, further peripherals of types A, B etc. might be combined with the called-for X model signal processing unit 1.
The output of the configuration memory 15 drives the signal processing unit 1.
In the light of the present hardware configuration as shown by the switch 17 in Fig.
1, a specific 2o processing mode is activated at the signal processing unit 1, corresponding to SMN, or is enabled. If the software of the processing mode has not yet been loaded into the signal processing unit 1, then, on account of the detected configuration in the configuration memory 15, the loading of processing modes software can be blocked when such modes are outside the called-for hearing-aid hardware configuration. If, as shown schematically in Fig. 1, a 2s transceiver 30 is used, by means of which the signal processing unit 1 is loaded in wireless manner with the desired processing program, then, as diagrammatically shown at the switch 17a, implementation using the transceiver 30 shall be precluded if the implementation is tried for a processing mode other than for the X, M, N configuration.
The output of the configuration memory 15 preferably is connected to an output HGA
of the hearing aid. When fitting the hearing aid to the patient, said output is fed to the PC
supported fitting unit 19 whereby the hearing aid is identified by its individual configuration at the fitting unit 19. As shown in dashed lines, and in a preferred embodiment, the said output HGA can be implemented by the transceiver (HG'A). Basically a transceiver 30 is needed and most advantageous, even mandatory for binaural signal processing. In such a design the two signal processing units 1 are able to communicate with each other, or, in preferred manner, io binaural signal processing may be carried out in a common unit 1.
In a further preferred embodiment shown in Fig. 2, the communication between a central processing unit 1 and peripherals 3, further with the read-only memory 11, for instance an EEPROM, and, as regards hearing-aid fitting, with an external fitting apparatus, can be basically implemented using a bus 21 and interfaces of the cited units.
Preferably standard is interfaces shall be used (omitted)in particular simple ones, and especially having only two- or three-signal lines such as and preferably 12C and 12S interfaces such as are presently marketed by Philips, or AES-3 interfaces (Audio-Engineering Society) or SPI interfaces (Motorola).
As further shown in Fig. 2, a two-way communications link is in place at least partly and by means of a bus 21 between the peripherals 3 and the central signal processing unit 1, 2o whereby further specific values such as further configuration parameters, optional and/or revised data can be transmitted jointly with the component identification shown in Fig. 1 from the peripherals to the central processing unit, and from the central signal processing unit 1, data can be sent back to the peripherals. Preferably and as shown in Fig. 2, the central signal processing unit 1 includes a signal processing component 1a as well as controller component 2s 1b which through the bus 21 controls and monitors the identification of configuration.
Fig. 3 shows a preferred embodiment of the principle disclosed in Fig. 2. The peripherals basically are divided into audio-signal units or components 3AU
and control units or components 3S and, depending on type, are treated as audio-signal components or pure control components or, in this respect, in a hybrid constellation. The audio components 3Au s are connected through a first bus 21AU and (omitted) corresponding interfaces to the signal processing component 1 a of the signal processing unit 1, whereas the control components 3S
are connected through a second bus 21 S to the control component 1 b of the signal processing unit 1, again by means of corresponding interfaces. Preferably interfaces of different specifications are used for the connection between the audio components 3AU, the bus 21Au io and the signal processing component 1a than for the connection between the control components 3S, the bus 21S are and for the controller component 1b.
Preferably three-wire interfaces preferably based on the 12S interfaces cited above are used for the former connection.
As regards the latter connection, namely the real control connection, preferably two-is wire interfaces are used, in particularly preferably based on the above cited kind of 12C
interfaces.
As shown in dashed lines, hybrid peripherals participating in the audio signal processing and being controlled and vice-versa, are each connected to the correspondingly preferred audio signal interfaces or control interfaces, additionally also to the second of the 2o buses provided.
The module of the invention offers a real "plug and play" modular system for hearing aids allowing sharply lowering manufacturing costs, minimizing the connection configuration at the central signal processing unit and in particular substantially precluding erroneous packaging, erroneous configurations, mismatching etc. based on human inattentiveness.

Claims (11)

1. A hearing aid comprising a central, digital signal processing unit (1) connected at its inputs and outputs to digital, hybrid and/or analogue peripherals (3E, 3A) characterized in that at least some of the peripherals each comprise one identification unit (5) of which the output is connected to the input of a comparator (9), this comparator being connected at its input to a memory (11) storing possible identifications while its output drives a configuration memory (15).
2. Hearing aid as claimed in claim 1, characterized in that the output of the comparator (9) is connected to the operations-selecting input (17) of the signal processing unit (1).
3. Hearing aid as claimed in either of claims 1 and 2, characterized in that at least one bus and peripherals implement the connection between peripherals and the central signal processing unit.
4. Hearing aid as claimed in one of claims 1 through 3, characterized in that the hearing aid comprises an output (HG A, HG'A) connected to the configuration memory (15).
5. Hearing aid as claimed in claim 3, characterized in that the interfaces include three-wire interfaces and/or two-wire interfaces.
6. Hearing aid as claimed in claim 3, characterized in that the audio signal components in the form of peripherals are connected through a first bus and first interfaces to the signal processing unit and in the form of peripherals are connected through a second bus and second interfaces to the signal processing unit, the first peripherals preferably being at least three-wire interfaces, the second interfaces preferably being at least two-wire interfaces, the former preferably being based on I2S interfaces and the latter preferably being based on I2C interfaces.
7. Hearing aid as claimed in one of claims 1 through 6, characterized in that the peripherals include one or more components: sensors, actuators, transceivers, manual selection switches, potentiometers.
8. Hearing aid as claimed in claim 4, characterized in that the output is in the form of a transceiver.
9. A method for manufacturing a hearing aid comprising a central, digital signal processing unit and, associated with latter, a peripheral, characterized in that the peripherals are installed jointly with the central digital signal processing unit and then the identities of the peripherals are automatically interrogated and stored.
10. Method as claimed in claim 9, characterized in that the operation of the signal processing unit is selected by means of the interrogated identities of the peripheral, preferably that operation extraneous to implementing one of the peripherals shall be precluded.
11. Method as claimed in either of claims 9 and 10, characterized in that based on said identification, signals at the connections to and/or from the digital signal processing unit shall be interpreted in different manners.
CA2352346A 1998-11-24 1998-11-24 Hearing aid Expired - Fee Related CA2352346C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH1998/000502 WO1999009799A2 (en) 1998-11-24 1998-11-24 Hearing aid

Publications (2)

Publication Number Publication Date
CA2352346A1 CA2352346A1 (en) 1999-03-04
CA2352346C true CA2352346C (en) 2011-01-11

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US (2) US7286678B1 (en)
EP (1) EP1133897B1 (en)
JP (1) JP4294856B2 (en)
CN (1) CN1348674A (en)
AU (1) AU766092B2 (en)
CA (1) CA2352346C (en)
DE (1) DE59814095D1 (en)
DK (1) DK1133897T3 (en)
WO (1) WO1999009799A2 (en)

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Publication number Publication date
AU1139499A (en) 1999-03-16
DE59814095D1 (en) 2007-10-25
EP1133897B1 (en) 2007-09-12
US8027496B2 (en) 2011-09-27
EP1133897A2 (en) 2001-09-19
JP4294856B2 (en) 2009-07-15
DK1133897T3 (en) 2008-01-07
WO1999009799A3 (en) 1999-10-07
WO1999009799A2 (en) 1999-03-04
US7286678B1 (en) 2007-10-23
US20080008340A1 (en) 2008-01-10
AU766092B2 (en) 2003-10-09
JP2001527302A (en) 2001-12-25
CA2352346A1 (en) 1999-03-04
CN1348674A (en) 2002-05-08

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