WO2000002419A1 - Membrane protective exterieure pour microphone - Google Patents

Membrane protective exterieure pour microphone Download PDF

Info

Publication number
WO2000002419A1
WO2000002419A1 PCT/US1999/013445 US9913445W WO0002419A1 WO 2000002419 A1 WO2000002419 A1 WO 2000002419A1 US 9913445 W US9913445 W US 9913445W WO 0002419 A1 WO0002419 A1 WO 0002419A1
Authority
WO
WIPO (PCT)
Prior art keywords
capturing device
sound capturing
housing
aperture
porous
Prior art date
Application number
PCT/US1999/013445
Other languages
English (en)
Inventor
William R. Williams
David Q. Dobras
Patrick A. Mavrakis
David L. Luger
Original Assignee
Resound Corporation
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 Resound Corporation filed Critical Resound Corporation
Priority to AU45670/99A priority Critical patent/AU4567099A/en
Publication of WO2000002419A1 publication Critical patent/WO2000002419A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • H04R1/086—Protective screens, e.g. all weather or wind screens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/07—Mechanical or electrical reduction of wind noise generated by wind passing a microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception

Definitions

  • the invention relates to a sound capturing system, such as for a hearing aid, a two-way communication device, or a multimedia device, and more particularly, the invention relates to a sound capturing system for capturing the speech sounds of the user that includes a windproof and waterproof microphone assembly.
  • Some users require devices such as voice pickups that provide a high quality capture of sound, for example, of the user's speech, and that are compact, discreet and convenient.
  • U.S. Secret Service agents assigned to covertly protect individuals require two way communications systems that are unobtrusive and allow them to clearly communicate with remote locations.
  • Such an application requires a sound pickup that an agent can wear which is both discreet and accurate, particularly in situations such as a crowded room where ambient sound levels are high.
  • Conventional two way communications systems used in such applications typically have boom-mounted or lapel-mounted microphones. Boom-mounted microphones are difficult to conceal, and lapel- mounted microphones and other conventional microphones mounted remotely from the user's mouth often suffer from a relatively low signal-to-noise ratio, especially in noisy environments.
  • microphone elements are mounted on the inside of the housings of sound capturing systems; and if a seal is used, it is placed on the inside surface of the housing. A small opening, either a hole or a slot, then protrudes through the housing and is exposed to the outside environment. In many designs, the surface tension of the water causes the water to "skin" over the port, and block the audio path to the microphone.
  • Prior art wind/breath screens for microphones are exemplified by Das et. al., U.S. Patent 4,570,746 which describes a screen that includes a rigid perforated structure for enclosing a microphone which is physically isolated from the rigid perforated structure by a surrounding pad of air there-between and a compliant support member.
  • a porous layer e.g., latex foam
  • the element described in the patent is a close-talking element, one of a class of elements known as pressure- difference or pressure-gradient microphones.
  • the pressure-difference element has two spaced-apart sound ports into the microphone capsule, one leading to the front of the diaphragm and the other leading to the back.
  • the front and back pressures are nearly identical and the pressures cancel, so there is little output signal from the microphone.
  • the source of sound is close to the microphone, there is a difference in the pressure because the ports are separated. Sound pressure is proportional to the inverse of distance, which creates this close-talking effect.
  • Prior art screens which were applied directly against the outside of the housing as discussed by Das et. al. upset the equality since amplitude and phase must both be equal and subsequently the cancellation effect is reduced or eliminated. Das et. al.
  • the Das et. al. device requires an air space between the screen and the sound ports of the microphone element or the screen will not work.
  • FIG. 1 is a partially exploded perspective view of a sound capturing device according to the present invention
  • FIG. 2 A and 2B are perspective cut away views of the microphone housing
  • FIG. 3 is a partial cut away of the microphone housing showing the protective membrane essentially completely covering the aperture of the external port;
  • FIGS. 4, 6, 8 and 10 are frequency response graphs;
  • FIGS. 5, 7, and 9 are polar graphs of the frequency response of an embodiment of the invention worn in a user's right ear, looking down upon the user where 0 degrees indicates a forward direction, i.e., the direction in which the user is facing.
  • the present invention relates to a sound capturing system having a microphone with a windproof and waterproof membrane that eliminates the ability of water to easily block a microphone port.
  • an external breathable membrane seal is wrapped around the front and back ports of a noise canceling or directional microphone.
  • the membrane is configured as a "band-aid" strip that can be easily removed and replaced.
  • the invention is directed to a sound capturing device that minimizes interference by ambient wind and water that includes: a housing having walls that have at least one aperture that is in acoustic communication with the environment external to the housing, and wherein each aperture has an exterior port; a microphone that is positioned in the housing; and a protective material that covers the exterior port of each aperture and that is exposed to the environment, wherein the protective material comprises (a) a porous, hydrophobic membrane having a sufficiently small pore size to prevent the accumulation of moisture in and the entrance of water through the porous hydrophobic membrane, and (b) an air flow attenuating membrane having an effective thickness to reduce the turbulence of ambient wind impinging upon the exterior port.
  • the invention is directed to a sound capturing device that suppresses the effects of wind and water disturbances that includes: a housing having walls that have at least two apertures that are in acoustic communication with the environment that is external of the housing wherein each aperture has an exterior port; a microphone capsule or element that is positioned in the housing, wherein the capsule or element has at least two openings that are connected to corresponding apertures; a protective material that covers the exterior port of each aperture, wherein the protective material comprises (a) a porous, hydrophobic membrane having a sufficiently small pore size to prevent the accumulation of moisture in and the entrance of water through the hydrophobic membrane, and (b) an air flow attenuating membrane having an effective thickness to reduce the turbulence of ambient wind impinging upon the exterior port.
  • the protective membrane and preferably the porous, hydrophobic inner layer membrane thereof is directly against the microphone ports.
  • the hydrophobic wind screen is adhered directly to the microphone housing and directly covers the external sound ports.
  • a microphone capsule or element is contained within the housing preferably with two ports and is a pressure-difference element.
  • the microphone preferably uses differential acoustic phase delays to develop a directional characteristic to the microphone sensitivity, in addition to having the rapid decrease in sensitivity with distance of a close-talking microphone, as described in U.S. Patent Application
  • the invention will be described using a sound capturing system that includes a microphone housing having ports that pick up sounds and allows the sound to be transmitted by the system back to a remote location or processed for use by a hearing impaired user. It is understood that the invention is applicable to communication devices in general that employ microphones, particularly those devices which are used in situations where environmental conditions, e.g., high wind and moisture levels, will adversely affect conventional microphones that are not equipped with the inventive protective membrane. As used herein, the terms “microphone element” and “microphone capsule” are meant to be equivalent.
  • a sound capturing system 10 for capturing sound from a user includes a body 12, and microphone 26.
  • Body 12 includes a cable 20 for electrical connection to a communication device such as a telephone, multimedia device, or other transmitting and/or receiving device.
  • the communication device to which the sound capturing system 10 is connected by the cable 20 may be a fixed device or a portable device which may be worn on the person.
  • the invention has been illustrated with a cable 20 for connection to external electronics, the cable may be omitted for certain devices and a wireless link may be used. Alternatively, for a hearing aid device, the electronics may be entirely contained within the body 12.
  • the body 12 includes a case portion 22 containing appropriate sound receiving and processing circuitry for a particular application.
  • the case portion 22 may contain a sound processing circuit, receiver and battery.
  • the case portion 22 is configured to be received and concealed behind the ear of the user.
  • An ear hook portion 24 of the body 12 extends from the case portion 22 and curves over the ear of the user.
  • the ear hook portion 24 supports the body 12 securely on the user's ear.
  • a microphone 26 may be mounted on an upper surface of the ear hook portion 24. The microphone 26 picks up sounds and allows the sound to be transmitted by the sound delivery system back to a remote location or processed for use by the hearing impaired user.
  • the sound capture system comprises a voice pickup device that is highly discreet, and which capture a user's speech with a high sound quality and a relatively large signal-to-ambient noise ratio.
  • a standard miniature pressure gradient type microphone element is provided and mounted very close to the side of the user's head, preferably near the user's ear. The microphone element is oriented so that its direction of maximum sensitivity is parallel to the side of the user's head, and pointing as much as possible toward the user's mouth.
  • a miniature pressure gradient type microphone element is provided with low pass networks formed using acoustic resistances at front and rear ports of the microphone, instead of delay networks. These resistances are matched by design with air volumes in the element, so that the resistances and the air volumes together act as acoustic low-pass networks that provide directional sound pickup properties that vary with frequency. These directional properties further enhance the noise-rejection capability of the microphone element.
  • the microphone housing 26 includes front port 52 and back port 54 which are covered by protective membranes 62 and 64, respectively.
  • the ports can have any cross-sectional configuration, e.g. , rectangular or circular.
  • each port is circular with a diameter of about 25 mils to 50 mils and preferably about 35 to 40 mils.
  • a preferred device 60 for attaching the protective membranes onto the exterior surface of the microphone housing comprises a laminated structure comprising liner 66 having adhesive material (not shown) on its perimeter around protective membranes 62 and 64, as depicted in FIG. 1.
  • liner 66 having adhesive material (not shown) on its perimeter around protective membranes 62 and 64, as depicted in FIG. 1.
  • the external surface of the housing in the proximity of the ports has a smooth convex contour.
  • the "band-aid” strip can be wrapped around the housing continuously without creating any significant crevices between the external surface of the housing and the inner layer of the protective membrane through which moisture can enter.
  • the "band-aid” strip can be readily removed and replaced if it becomes worn or soiled.
  • Another method of attaching the protective membrane is to configure the protective membrane as a cap with an interior contour that matches the outer contour of the microphone housing. In this fashion, the cap of the protective membrane can be placed over the housing.
  • the bottom perimeter of the cap may include a miniature draw cord, elastic band or metal clip to secure the cap.
  • Each of the protective membranes 62 and 64 of the band-aid strip that is in contact with ports 52 and 64, respectively, preferably comprises a bilayer laminate.
  • the inner layer which faces the port is preferably a hydrophobic, porous material such as a fluorocarbon polymer having a pore size of about 2 ⁇ m to 4 ⁇ m and preferably about 2.5 ⁇ m to 3.5 ⁇ m.
  • the thickness of the inner layer typically ranges from about 1 mil to 3 mils and more preferably from about 1.5 mils to 2.5 mils.
  • a preferred material is a 2 mil thick polytetrafluoroethylene (TEFLON) having a pore size of about 3 ⁇ m.
  • the inner layer is attached to an outer layer that is exposed to the environment and which is preferably a polymeric material that reduces the turbulent flow of wind as it reaches the port.
  • the thickness of the polymeric material typically ranges from about 6 mils to 12 mils and preferably 8 mils to 10 mils.
  • a preferred material is a 9 mils thick water resistant, non-woven polyester.
  • a preferred bilayer laminate suitable for covering the ports is available as GORE-TEX ALL WEATHER VENTS from W.L. Gore & Assoc, Inc., Elkton, MD.
  • the bilayer laminate is attached to the external surface of the microphone housing 26 with adhesive that is approximately 2.5 mils to 5.5 mils thick. As shown in FIG.
  • adhesive layer 66 binds the inner layer to the external housing but the adhesive layer should not extend over the port since the adhesive blocks the sound transmissive pores in the protective membrane and thus block the port.
  • the surface of the inner layer which is facing the port apertures covers the port apertures with essentially little or no gap space between the external surface of the microphone housing around the port and the inner layer of the laminate, as shown in FIG. 3. Essentially, the surface of the inner layer that covers the aperture is flush with the external surface of the microphone housing around the aperture.
  • the band-aid strip is preferably positioned into a recess on the external surface of the plastic housing. If this recess were planar, water could easily fill up the recess and block the port. Since the protective membrane of the band-aid strip wraps around a corner of the housing surface, the possibility for water to fill up the recess is reduced; the water simply rolls off and leaves the audio port unobstructed. If the protective membrane was placed on the inside of the housing, a small drop of water could easily block the port hole as in conventional designs, since the ports are small and water tends to be pulled in and held by capillary forces.
  • This water blockage problem could also be solved by using a planar protective membrane on the outside of the microphone port, as long as the protective membrane was not placed into a recess. Not putting the protective membrane in a recess in many instances is impractical due to the lack of protection afforded the protective membrane and the tendency for the exposed edges to peel up. Also, it could allow water to bypass the membrane at the edges that will then wick into the port opening and block the ports.
  • FIGS. 2 A and 2B depict microphone housing 26 containing microphone capsule 86 which includes microphone components and circuitry (not shown) therein.
  • the microphone capsule has ports 92 and 94 which are attachable to suspension elements 82 and 84, respectively.
  • the suspension elements are made of flexible, resilient material, e.g., natural or silicone rubber, and they serve to support the microphone capsule inside the housing and at the same time acoustically and vibrationally isolate it from housing vibrations.
  • Each suspension has a flange structure at the distal end which is configured to fit into grooves along the inner wall of the housing.
  • FIG. 2B shows the microphone capsule/suspension element assembly as positioned inside the interior chamber 80.
  • Interior chamber 80 is not in acoustic communication with the capsule ports and/or housing ports. Indeed, instead of being filled with air the interior chamber can be filled with a solid material, however, in this latter case, the microphone element would be subject to higher levels of vibrational disturbance.
  • the interior chamber 80 serves only to isolate the microphone capsules from those vibrations.
  • the "head” was a KEMAR mannequin, so the measured responses included all head and torso effects as well.
  • the earpiece was placed on the right ear of the mannequin for these tests.
  • This microphone system was designed for a telecommunications application where the frequency band being transmitted extends from 300 Hz to 3 kHz, so response deviations outside of this frequency band were not important
  • FIG. 4 shows the frequency response of the microphone system, without the protective membrane in place.
  • the bass rolloff shown in this graph can be eliminated by electronically equalizing the microphone amplifier, however, this correction was not done in the units tested.
  • FIG. 5 shows the polar plots, i.e., directionality characteristics of this same configuration.
  • the polar data was taken at four octave-separated frequencies of 500 Hz, 1 kHz, 2 kHz and 4 kHz. All measurements had an accuracy of +2.5dB and were only reproducible down to about 250 Hz. Thus, any deviations within these tolerances are not significant.
  • FIGS. 6 and 7 are the frequency response and polar plots, respectively, for the same system but with the membrane protective "band-aid" strip in place. The membrane covered both microphone ports. For this test the protective membrane was dry. As is apparent, except for a slight decrease in sensitivity above 5 kHz, there is essentially no adverse effect on the microphone's performance.
  • FIGS. 8 and 9 show the microphone's performance after thoroughly drenching the protective membrane with water spray. Visual inspection of the protective membrane revealed no water accumulation and comparison of the data to those in FIGS. 6 and 7 confirmed that there was no acoustic degradation.
  • FIG. 10 is a frequency response graph comparing the curves from FIGS. 4, 6, and 8. A slight high frequency performance change is visible above the frequency band of interest when adding the protective membrane, but otherwise, there are no significant changes caused by the membrane material, whether wet or dry.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

La présente invention concerne un dispositif de prise de son ramenant à un minimum les interférences imputables à un environnement venteux ou humide. Le dispositif comporte (a) un carter (10) dont les parois présentent au moins une ouverture (52, 54) en communication acoustique avec le milieu extérieur du carter, chaque ouverture comportant un orifice extérieur. Le dispositif comporte également (b) un microphone (26) logé dans le carter. Un matériau protecteur remplaçable (62, 64) recouvrant l'orifice extérieur de chaque ouverture est exposé au milieu ambiant. En l'occurrence, le matériau protecteur comporte (i) une membrane poreuse hydrophobe dont la taille des pores est suffisamment petite pour empêcher l'accumulation d'humidité à l'intérieur par rapport à la membrane et l'entrée d'eau en traversant la membrane hydrophobe. Le matériau protecteur comporte également (ii) une membrane atténuant le courant d'air et d'une épaisseur est assez importante pour réduire la turbulence du courant d'air incident à l'extérieur de l'orifice. Ce dispositif de prise de son peut être un dispositif de communications bidirectionnel, une prothèse auditive, un casque téléphonique, un casque audio multimédia, ou tout autre dispositif de communications.
PCT/US1999/013445 1998-07-01 1999-06-16 Membrane protective exterieure pour microphone WO2000002419A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU45670/99A AU4567099A (en) 1998-07-01 1999-06-16 External microphone protective membrane

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10856898A 1998-07-01 1998-07-01
US09/108,568 1998-07-01

Publications (1)

Publication Number Publication Date
WO2000002419A1 true WO2000002419A1 (fr) 2000-01-13

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PCT/US1999/013445 WO2000002419A1 (fr) 1998-07-01 1999-06-16 Membrane protective exterieure pour microphone

Country Status (2)

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AU (1) AU4567099A (fr)
WO (1) WO2000002419A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10045197C1 (de) * 2000-09-13 2002-03-07 Siemens Audiologische Technik Verfahren zum Betrieb eines Hörhilfegerätes oder Hörgerätessystems sowie Hörhilfegerät oder Hörgerätesystem
EP1229758A2 (fr) * 2001-01-12 2002-08-07 Microtronic Nederland B.V. Suppression du bruit de souffle dans un microphone directionnel
WO2007109517A1 (fr) * 2006-03-17 2007-09-27 Donaldson Company, Inc capot de protection du microphone d'une prothèse auditive
WO2008154954A1 (fr) * 2007-06-18 2008-12-24 Phonak Ag Couvercle pour ouvertures de boîtier de microdispositif électrique
US7561710B2 (en) 2003-12-05 2009-07-14 Oticon A/S Communication device with microphone
EP2451194A3 (fr) * 2010-11-04 2012-09-26 Siemens Medical Instruments Pte. Ltd. Procédé et appareil auditif destinés à la détermination de l'humidité
WO2014158426A1 (fr) * 2013-03-13 2014-10-02 Kopin Corporation Lunettes munies d'un réseau de microphones
US8873783B2 (en) 2010-03-19 2014-10-28 Advanced Bionics Ag Waterproof acoustic element enclosures and apparatus including the same
WO2015024077A1 (fr) * 2013-08-23 2015-02-26 Hear Ip Pty Ltd Dispositif de prothèse auditive
US9132270B2 (en) 2011-01-18 2015-09-15 Advanced Bionics Ag Moisture resistant headpieces and implantable cochlear stimulation systems including the same
US10306389B2 (en) 2013-03-13 2019-05-28 Kopin Corporation Head wearable acoustic system with noise canceling microphone geometry apparatuses and methods
US10339952B2 (en) 2013-03-13 2019-07-02 Kopin Corporation Apparatuses and systems for acoustic channel auto-balancing during multi-channel signal extraction
US11631421B2 (en) 2015-10-18 2023-04-18 Solos Technology Limited Apparatuses and methods for enhanced speech recognition in variable environments
US11638107B2 (en) 2020-11-11 2023-04-25 Gn Hearing A/S Hearing device with two microphone filters

Citations (5)

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Publication number Priority date Publication date Assignee Title
US3749853A (en) * 1972-05-18 1973-07-31 Zenith Radio Corp Hearing aid with directional microphone system
US3835263A (en) * 1973-02-05 1974-09-10 Industrial Research Prod Inc Microphone assembly operable in directional and non-directional modes
US3987258A (en) * 1974-04-30 1976-10-19 Matsushita Electric Industrial Co., Ltd. Water-proof sound apparatus
US4073366A (en) * 1976-07-26 1978-02-14 Estes Roger Q Disposable noise reducing hearing aid attachment
US4966252A (en) * 1989-08-28 1990-10-30 Drever Leslie C Microphone windscreen and method of fabricating the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3749853A (en) * 1972-05-18 1973-07-31 Zenith Radio Corp Hearing aid with directional microphone system
US3835263A (en) * 1973-02-05 1974-09-10 Industrial Research Prod Inc Microphone assembly operable in directional and non-directional modes
US3987258A (en) * 1974-04-30 1976-10-19 Matsushita Electric Industrial Co., Ltd. Water-proof sound apparatus
US4073366A (en) * 1976-07-26 1978-02-14 Estes Roger Q Disposable noise reducing hearing aid attachment
US4966252A (en) * 1989-08-28 1990-10-30 Drever Leslie C Microphone windscreen and method of fabricating the same

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6882736B2 (en) 2000-09-13 2005-04-19 Siemens Audiologische Technik Gmbh Method for operating a hearing aid or hearing aid system, and a hearing aid and hearing aid system
DE10045197C1 (de) * 2000-09-13 2002-03-07 Siemens Audiologische Technik Verfahren zum Betrieb eines Hörhilfegerätes oder Hörgerätessystems sowie Hörhilfegerät oder Hörgerätesystem
EP1229758A2 (fr) * 2001-01-12 2002-08-07 Microtronic Nederland B.V. Suppression du bruit de souffle dans un microphone directionnel
EP1229758A3 (fr) * 2001-01-12 2007-08-15 Sonionmicrotronic Nederland B.V. Suppression du bruit de souffle dans un microphone directionnel
US7561710B2 (en) 2003-12-05 2009-07-14 Oticon A/S Communication device with microphone
WO2007109517A1 (fr) * 2006-03-17 2007-09-27 Donaldson Company, Inc capot de protection du microphone d'une prothèse auditive
WO2008154954A1 (fr) * 2007-06-18 2008-12-24 Phonak Ag Couvercle pour ouvertures de boîtier de microdispositif électrique
US9204229B2 (en) 2010-03-19 2015-12-01 Advanced Bionics Ag Waterproof acoustic element enclosures and apparatus including the same
US8873783B2 (en) 2010-03-19 2014-10-28 Advanced Bionics Ag Waterproof acoustic element enclosures and apparatus including the same
EP2451194A3 (fr) * 2010-11-04 2012-09-26 Siemens Medical Instruments Pte. Ltd. Procédé et appareil auditif destinés à la détermination de l'humidité
US9973867B2 (en) 2011-01-18 2018-05-15 Advanced Bionics Ag Moisture resistant headpieces and implantable cochlear stimulation systems including the same
US9132270B2 (en) 2011-01-18 2015-09-15 Advanced Bionics Ag Moisture resistant headpieces and implantable cochlear stimulation systems including the same
US9753311B2 (en) 2013-03-13 2017-09-05 Kopin Corporation Eye glasses with microphone array
US9810925B2 (en) 2013-03-13 2017-11-07 Kopin Corporation Noise cancelling microphone apparatus
WO2014158426A1 (fr) * 2013-03-13 2014-10-02 Kopin Corporation Lunettes munies d'un réseau de microphones
US10306389B2 (en) 2013-03-13 2019-05-28 Kopin Corporation Head wearable acoustic system with noise canceling microphone geometry apparatuses and methods
US10339952B2 (en) 2013-03-13 2019-07-02 Kopin Corporation Apparatuses and systems for acoustic channel auto-balancing during multi-channel signal extraction
US10379386B2 (en) 2013-03-13 2019-08-13 Kopin Corporation Noise cancelling microphone apparatus
WO2015024077A1 (fr) * 2013-08-23 2015-02-26 Hear Ip Pty Ltd Dispositif de prothèse auditive
US11631421B2 (en) 2015-10-18 2023-04-18 Solos Technology Limited Apparatuses and methods for enhanced speech recognition in variable environments
US11638107B2 (en) 2020-11-11 2023-04-25 Gn Hearing A/S Hearing device with two microphone filters
US11871168B2 (en) 2020-11-11 2024-01-09 Gn Hearing A/S Hearing device with two microphone filters

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