EP0487413A1 - Elektrische Vorrichtung für ein programmierbares Miniatur-Hörgerät, insbesondere vom intraauricularen Typ - Google Patents

Elektrische Vorrichtung für ein programmierbares Miniatur-Hörgerät, insbesondere vom intraauricularen Typ Download PDF

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Publication number
EP0487413A1
EP0487413A1 EP91403122A EP91403122A EP0487413A1 EP 0487413 A1 EP0487413 A1 EP 0487413A1 EP 91403122 A EP91403122 A EP 91403122A EP 91403122 A EP91403122 A EP 91403122A EP 0487413 A1 EP0487413 A1 EP 0487413A1
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EP
European Patent Office
Prior art keywords
integrated circuit
voltage
circuit
battery
programmable
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.)
Granted
Application number
EP91403122A
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English (en)
French (fr)
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EP0487413B1 (de
Inventor
Patrice Flippe
Pierre Laurent
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ALPHA I Ste
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Alpha I Ste
Intrason France
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Publication date
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Publication of EP0487413A1 publication Critical patent/EP0487413A1/de
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Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/70—Adaptation of deaf aid to hearing loss, e.g. initial electronic fitting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/023—Completely in the canal [CIC] hearing aids

Definitions

  • the invention relates to miniature electronic devices, in particular, but not exclusively, such electronic devices intended to be used as a hearing aid.
  • hearing aids those which are external to the ear, those which are housed at least partly in the pavilion or the conch of the ear (intra-conch prosthesis) and the prostheses which are completely housed inside the ear canal or canal (intra-canal or intra-canal prosthesis).
  • hearing aids whose correction mode is programmable, but in a fixed manner by construction, and those whose programming mode is adjustable at any time, which are usually called dynamically programmable hearing aids.
  • the present invention specifically proposes an electronic device allowing the production of such a prosthesis.
  • the proposed device is of the type comprising a microphone, programmable filtering means, adjustable amplification means and a sound reproduction transducer, powered by batteries.
  • the filtering and amplification means are produced in the form of at least one integrated circuit, comprising at least one oscillator associated with at least one DC-DC step-up converter, the assembly being supplied from a single low-voltage miniature battery.
  • the amplifier supplied from the same battery, can be part of the aforementioned means, or be produced separately, as a power amplifier, in a single integrated circuit, provided in principle with external decoupling capacitors, possibly incorporated in the earpiece.
  • two integrated circuits are provided, one for the necessary amplification (most often, preamplification before the actual filtering), the other to form the programmable filter and its auxiliary circuits. Quite unusually, it has proved possible to obtain satisfactory operation by mounting these two integrated circuits one on the other, as will be seen below.
  • the integrated circuits are produced in so-called SACMOS technology, on a hybrid circuit of the multi-layer co-cooked type, comprising said resistors, while the capacitors are located on the back.
  • the filtering means comprise, in the same integrated circuit, filters with switched capacities, their control memory and, in principle, its programming interface, for dynamic programming.
  • the switched capacity filters are controlled for switching by a low frequency oscillator controlled by quartz and associated with at least one step-up DC-DC converter at low voltage. Preferably, this feeds a high frequency oscillator associated with another high-voltage step-up DC-DC converter. Such a high voltage is indeed necessary for writing to memories. Only the quartz of the low frequency oscillator, resistors and capacitors are external to the integrated circuit.
  • the interface responds to a single command to produce the write voltage in memory and the command to switch to write mode (loading or "LOAD"), which minimizes the need for connection and the size of the connector which must be associated with the hybrid circuit.
  • the filtering means comprise means for adjusting in the vicinity of two frequencies located in the center of the audible band.
  • the particular acoustic characteristics of the prosthesis according to the invention are improved, taking into account the resonances linked to the implantation of the device in the ear canal, by providing one or, preferably, several adjustments of the bandpass type. , at frequencies in the center of the audible band.
  • the device according to the invention is powered by a battery 1 whose nominal voltage is 1.3 V. It is a miniature battery such as the model 312, 13, 10, 675 or any other suitable battery or accumulator.
  • the device comprises a microphone 2 which can be the model 3046, EA 1842, EK 3024 or any other model of microphone for hearing aid, preferably of the electret type.
  • This microphone 2 is connected by a capacitor 29 to a preamplifier 3 which is the first integrated circuit chip U1.
  • a preamplifier 3 which is the first integrated circuit chip U1.
  • This U1 chip can be, for example, the model GC509 / LC508 sold by the company GENNUM Corporation. It has two external resistors 31 and 32, as well as a miniature potentiometer 38, for volume control.
  • a chip with preamplifier and amplifier with variable gain is provided, this variable gain being obtained by a switched-capacity sampling technique, in which case an anti-aliasing filter and a sample-and-hold circuit are incorporated between the analog preamplifier and its automatic gain control.
  • the output of the preamplifier 3 is interconnected by a capacitor 39 to the filtering circuit 4 proper which is produced by a second integrated circuit chip U2, with external capacitors 73, 74, 75, 77 and 78.
  • the output of the chip U2 is connected by a capacitor 80 to a listener 8, with or without a power amplifier 8, consisting of a third chip U3.
  • the amplified earphone can be one of the models from the company KNOWLES EP 3073, EP 3074, or EP 3075.
  • Non-amplified KNOWLES earphones from the ED, EH or BK series, for example, can also agree, by making a power amplifier chip separately, or by adding an additional stage to the preamplifier 3.
  • the circuit of the filter 4 (possibly the circuit of the preamplifier 3) are provided with stages with switched capacity, capable of being controlled digitally (that is to say logically) from a fixed memory which is preferably of the E2PR0M type.
  • the programming of this memory is carried out by the PRG links.
  • a microcomputer 100 For programming (FIG. 2), a microcomputer 100 is used, provided in principle with a hard disk, a keyboard 102, a screen 104, and a specialized internal card 110, provided for communication. with E2PR0M memory. It is a serial card whose technical implementation does not pose any particular problem, this card being in principle similar to that used for already known programmable hearing aids, but not of the intra-duct type.
  • the microcomputer is advantageously of the current standard type, articulated on an 8086 or 80286 processor, with an operating system of the type known under the brand MS-DOS, or equivalent.
  • FIG. 3 shows diagrammatically how the two chips U2 and U1 can be implanted one on the other, on a substrate S of a hybrid circuit, the upper face of which bears, under the chip U2, a plurality resistors (not visible).
  • the quartz QZ1 can be mounted above the capacitors.
  • the microphone 2 the battery 1, the chip U3 of the amplifier 8 and its associated transducer 9 which is naturally placed side of the eardrum, while microphone 2 is placed on the side of the ear canal exit.
  • stage 40 It comprises, after the external connection capacitor 39, a stage 40 forming an input buffer amplifier.
  • stage 40 is followed by a stage 41 (with double amplifier) which has an anti-aliasing filter function, taking into account the sampling rate which will be considered below.
  • a stage 45 is then provided which has a smoothing function and comprises two internal substages 45A and 45B, the first 45A short-circuitable. These two substages receive the switching frequency fc used for the switched capacities and their function is to carry out the sampling required for these switched capacities.
  • stage 45 The output of stage 45 is applied to a set of filtering circuits with switched capacities 51 to 58.
  • Each filtering stage is short-circuitable. In addition, it is itself programmable to obtain several levels of filtering.
  • the first three filters 51 to 53 are dedicated to low-pass functions.
  • the next two filters, 54 and 55 are dedicated to bandpass filtering functions, preferably in the center of the audible acoustic band.
  • the last three filters 56 to 58 are dedicated to high-pass filtering functions.
  • the filters in question and other switching functions of the chip U2 are governed by the information bits contained in a memory 500 of the type E2PR0M which can, for example, include twenty-four useful bits.
  • a memory 500 With this memory 500 is associated an input register 501 which communicates by a control logic 505 with programming connections PRG, in principle three in number, to which are added on a same connector the two supply connections by battery. (not shown in Figure 4).
  • An oscillator 70 operating for example at 32 kHz, and assisted by an external crystal QZ1, supplies a frequency fc intended for all the switched capacities of the chip U2.
  • This frequency fc is also applied to two stages 71 and 72, the first of which is a voltage doubler and the second of which is a voltage tripler.
  • the voltage doubler 71 the diagram of which is of known type, operates from integrated capacitors to produce, under low energy, the control voltages of VGMOS gates for the field effect transistors that the U2 chip contains.
  • the tripling stage 72 must, on the other hand, provide a greater amount of energy. It is associated with three external capacities 73 to 75 which allow it to supply three supply voltages, in particular for the analog amplification stages. After stabilization in a circuit 76, also associated with two external capacitors 77 and 78, the two active voltages Vcirc are obtained, as well as the reference voltage for ground, not shown.
  • the output of the doubler 71 is therefore applied in particular to an adaptation stage mounted between the read outputs of the memory 500 and the field effect transistors forming a control of the degree of filtering in the stages with switched capacity 51 to 58. It is the same for the other switches of the circuit, in particular those which short-circuit the stages of the filters with switched capacity, and also stages, such as 45, provided with such switches .
  • the output voltages of the stabilization circuit 76 are applied to all the active components of the U2 chip. They therefore go in particular to the oscillator 110 and the circuits 515 and 519 which are associated with it.
  • the oscillator 110 provides a frequency of 1 MHz which is used in particular for the control of the memory 500 in reading, if necessary, in writing.
  • the output of oscillator 510 is also applied to a stage 515 which is another voltage booster, with integrated capacitors, which is capable of supplying a voltage of the order of 25 V for programming from memory 500 to the writing. Capacities can be integrated, since writing is relatively slow, which leaves the time necessary to accumulate the energy required for this programming.
  • the stage 515 is dependent on the write / read command already mentioned in connection with the control logic 505. In response to this command, we will at the same time present the signal corresponding to the bit to be written to register 501 of the memory 500 and carry out the write command, by applying the output of the voltage booster 515 on the line L which provides writing or loading (LOAD) in the memory 500.
  • LOAD writing or loading
  • auxiliary output of stage 515 actuates a silence circuit (MUTING) 519 which acts on one of the amplifiers of an output circuit 65 to inhibit the acoustic operation.
  • MUTING silence circuit
  • the output of the last stage 58 of filtering at capacities switched is applied to a circuit 60 which performs clipping by its median amplifier 60B with, at the input, a preamplifier stage 60A before clipping and, at the output, a wavelength filter 60C.
  • This set has the function of adjusting the maximum output level.
  • stage 60 The output of stage 60 is applied to an output stage 65 which first comprises a smoothing stage 65A, followed by an output buffer 65B.
  • the two substages of circuit 45, the first and last stages of circuit 60, as well as the first stage of circuit 65 receive the frequency fc to ensure the correct corrections, taking into account the sampling carried out by the switched capacitors.
  • all the filters with switched capacities also receive this frequency fc, at the same time as the control of at least one switch which is under the control of the content of the memory 500.
  • capacitors 39, 73, 74, 75, 77, 78 and 80 are implanted, in the form of metallizations at two levels, which the specialist will recognize.
  • connection areas on the left for the QZ1 crystal, which overlooks the central capacities 75 and 77, on the right for the output connections (hot spot OUT and power supplies S +, S), and the positive pole P + of the battery.
  • connection pads are provided, with the other input / output connections, on either side of the central stack of the two chips U1 and U2.
  • the hybrid circuit is made in five layers. Under the chips, the resistors are screen printed on the intermediate layers.
  • FIGS. 6A to 6C show the complete implantation of the prosthesis, enlarged substantially 10 times.
  • the diagram shows the hybrid circuit only.
  • the microphone, the amplified earpiece and the volume potentiometer are connected to it by flying wires. They are installed to minimize the volume occupied.
  • the hybrid circuit extends longitudinally in a parallelepiped volume visible in Figures 6, the length of which is less than about 11 mm, and the width of which is less than about 6 mm, the height being of the same order.
  • This prosthesis easily enters an ear canal, even a small one.
  • the PZ notch allows the microphone to be placed on the right or left side, depending on the ear canal concerned.
  • these adjustments are made at 1 or 2 kHz and at 3 kHz.
  • the choice of the frequency of 1 or 2 kHz is programmable.
  • the two filters are short-circuitable and also have two different filtering states. Their attenuation in the center can go up to -12 dB, for a V attenuation curve, with a width at half height of about +/- 30% of the central frequency.
  • the low-pass filters have a programmable slope with 4 values: 0 dB / octave, 6 dB / oct, 12 dB / oct and 18 dB / oct.
  • the cut-off frequency is programmable at 250 Hz, 500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz and 3 kHz, with an adjustment precision of +/- 5%.
  • the high-pass filters have a programmable slope with 4 values: 0 dB / octave, 6 dB / oct, 12 dB / oct and 18 dB / oct.
  • the cut-off frequency is programmable at 1 kHz, 2 kHz, 3 kHz and 4 kHz, with an adjustment precision of +/- 5%.
  • the programmable limiter limits the amplitude of the output signals in the range of 15 to 80 milliVolts RMS (+/- 5%), in steps of 15 mV RMS. It can be programmed off.
  • the prosthesis has excellent general characteristics, in particular in terms of noise level (which is a critical parameter with filters with switched capacitors). It is very well accepted and used by users, to whom it brings major progress.

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  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Prostheses (AREA)
  • Networks Using Active Elements (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Machine Translation (AREA)
  • Electrically Operated Instructional Devices (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Headphones And Earphones (AREA)
EP91403122A 1990-11-23 1991-11-20 Elektrische Vorrichtung für ein programmierbares Miniatur-Hörgerät, insbesondere vom intraauricularen Typ Expired - Lifetime EP0487413B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9014667A FR2669802B1 (fr) 1990-11-23 1990-11-23 Dispositif electronique formant prothese auditive programmable miniature, en particulier du type intra-conduit.
FR9014667 1990-11-23

Publications (2)

Publication Number Publication Date
EP0487413A1 true EP0487413A1 (de) 1992-05-27
EP0487413B1 EP0487413B1 (de) 1995-07-19

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EP91403122A Expired - Lifetime EP0487413B1 (de) 1990-11-23 1991-11-20 Elektrische Vorrichtung für ein programmierbares Miniatur-Hörgerät, insbesondere vom intraauricularen Typ

Country Status (11)

Country Link
US (1) US5402494A (de)
EP (1) EP0487413B1 (de)
JP (1) JP2875077B2 (de)
AT (1) ATE125412T1 (de)
AU (1) AU656743B2 (de)
CA (1) CA2056036C (de)
DE (1) DE69111388T2 (de)
DK (1) DK0487413T3 (de)
ES (1) ES2076493T3 (de)
FR (1) FR2669802B1 (de)
LV (1) LV11512B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000089A1 (en) * 1992-06-19 1994-01-06 Joseph Sylvester Chang Hearing protector
WO1996003848A1 (de) * 1994-07-21 1996-02-08 Institut Für Entwicklung Und Forschung Dr. Vielberth Kg Hörhilfe
EP0800331A3 (de) * 1996-04-03 1998-01-14 Microtronic Nederland B.V. Integrierter Mikrophon/Verstärker-Einheit, und eine Verstärkermodule dafür
WO1999060821A1 (en) * 1998-05-21 1999-11-25 In'tech Industries, Inc. Programming of programmable audio systems
US8489196B2 (en) 2003-10-03 2013-07-16 Medtronic, Inc. System, apparatus and method for interacting with a targeted tissue of a patient

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ATE311694T1 (de) * 1994-03-07 2005-12-15 Phonak Comm Ag Miniaturempfänger zum empfangen eines hochfrequenten frequenz- oder phasenmodulierten signales
US5600728A (en) * 1994-12-12 1997-02-04 Satre; Scot R. Miniaturized hearing aid circuit
JP3026547U (ja) * 1995-08-10 1996-07-16 日本ユーロテック株式会社 補聴器
US7010137B1 (en) 1997-03-12 2006-03-07 Sarnoff Corporation Hearing aid
DE29615554U1 (de) * 1996-09-06 1998-01-08 Türk + Türk Electronic GmbH, 51469 Bergisch Gladbach Hörgerät und Steuergerät zur Programmierung des Hörgerätes
US5909497A (en) * 1996-10-10 1999-06-01 Alexandrescu; Eugene Programmable hearing aid instrument and programming method thereof
DE19651126A1 (de) * 1996-12-09 1998-06-18 Siemens Audiologische Technik Serielles, bidirektionales Datenübermittlungsverfahren
US7787647B2 (en) * 1997-01-13 2010-08-31 Micro Ear Technology, Inc. Portable system for programming hearing aids
US6424722B1 (en) * 1997-01-13 2002-07-23 Micro Ear Technology, Inc. Portable system for programming hearing aids
US6449662B1 (en) 1997-01-13 2002-09-10 Micro Ear Technology, Inc. System for programming hearing aids
US6366863B1 (en) 1998-01-09 2002-04-02 Micro Ear Technology Inc. Portable hearing-related analysis system
US6445233B1 (en) 1999-12-30 2002-09-03 The Engineering Consortium, Inc. Multiple time constant rectifier apparatus and method
US6405164B1 (en) 1999-12-30 2002-06-11 Engineering Consortium, Inc. Audio compression circuit and method
DK1252799T3 (da) * 2000-01-20 2012-01-23 Starkey Lab Inc Fremgangsmåde og apparat til tilpasning af høreapparater
DE60136331D1 (de) * 2000-01-20 2008-12-11 Vibrant Med El Hearing Technol Verfahren zum prüfen von mittelohrimplantaten
US20030208099A1 (en) * 2001-01-19 2003-11-06 Geoffrey Ball Soundbridge test system
JP4129108B2 (ja) * 2000-02-25 2008-08-06 三菱電機株式会社 マイクロフォン用フィルタおよびマイクロフォン装置
US6829364B2 (en) * 2001-06-22 2004-12-07 Topholm & Westermann Aps, Ny Hearing aid with a capacitor having a large capacitance
CA2601662A1 (en) 2006-09-18 2008-03-18 Matthias Mullenborn Wireless interface for programming hearing assistance devices
US8649540B2 (en) * 2009-10-30 2014-02-11 Etymotic Research, Inc. Electronic earplug
US8161816B2 (en) * 2009-11-03 2012-04-24 Matthew Beck Hearing test method and apparatus
JP6034699B2 (ja) * 2013-01-07 2016-11-30 ルネサスエレクトロニクス株式会社 半導体装置及びそのコマンド制御方法
US11206499B2 (en) 2016-08-18 2021-12-21 Qualcomm Incorporated Hearable device comprising integrated device and wireless functionality

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WO1990010363A2 (en) * 1989-03-02 1990-09-07 Ensoniq Corporation Power efficient hearing aid

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US4396806B2 (en) * 1980-10-20 1998-06-02 A & L Ventures I Hearing aid amplifier
US4539440A (en) * 1983-05-16 1985-09-03 Michael Sciarra In-canal hearing aid
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US5001762A (en) * 1989-03-31 1991-03-19 Resistance Technology, Inc. Miniature modular volume control and integrated circuit assembly for use with a hearing air
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Patent Citations (2)

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DE3345921A1 (de) * 1983-01-11 1984-07-12 Gfeller AG, Bern Hoergeraet
WO1990010363A2 (en) * 1989-03-02 1990-09-07 Ensoniq Corporation Power efficient hearing aid

Non-Patent Citations (1)

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PROCEEDINGS OF THE IEEE 1988 CUSTOM INTEGRATED CIRCUITS CONFERENCE - ROCHESTER, NEW YORK, 16-19 MAI 1988 PAGES 12.6.1-12.6.4; F.CALLIAS ET AL.: 'A set of 4 IC's in CMOS technology for a programmable hearing aid' *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000089A1 (en) * 1992-06-19 1994-01-06 Joseph Sylvester Chang Hearing protector
WO1996003848A1 (de) * 1994-07-21 1996-02-08 Institut Für Entwicklung Und Forschung Dr. Vielberth Kg Hörhilfe
EP0800331A3 (de) * 1996-04-03 1998-01-14 Microtronic Nederland B.V. Integrierter Mikrophon/Verstärker-Einheit, und eine Verstärkermodule dafür
WO1999060821A1 (en) * 1998-05-21 1999-11-25 In'tech Industries, Inc. Programming of programmable audio systems
US6366676B1 (en) 1998-05-21 2002-04-02 In'tech Industries Programming pill and methods of manufacturing and using the same
US8489196B2 (en) 2003-10-03 2013-07-16 Medtronic, Inc. System, apparatus and method for interacting with a targeted tissue of a patient

Also Published As

Publication number Publication date
DE69111388T2 (de) 1996-01-25
CA2056036A1 (en) 1992-05-24
FR2669802B1 (fr) 1993-06-18
DK0487413T3 (da) 1995-09-11
EP0487413B1 (de) 1995-07-19
LV11512B (en) 1996-12-20
JP2875077B2 (ja) 1999-03-24
LV11512A (lv) 1996-08-20
US5402494A (en) 1995-03-28
ATE125412T1 (de) 1995-08-15
ES2076493T3 (es) 1995-11-01
AU8796091A (en) 1992-05-28
AU656743B2 (en) 1995-02-16
FR2669802A1 (fr) 1992-05-29
DE69111388D1 (de) 1995-08-24
JPH04269100A (ja) 1992-09-25
CA2056036C (en) 2000-01-25

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