CH587594A5 - - Google Patents

Info

Publication number
CH587594A5
CH587594A5 CH158974A CH158974A CH587594A5 CH 587594 A5 CH587594 A5 CH 587594A5 CH 158974 A CH158974 A CH 158974A CH 158974 A CH158974 A CH 158974A CH 587594 A5 CH587594 A5 CH 587594A5
Authority
CH
Switzerland
Application number
CH158974A
Original Assignee
Industrial Research Prod Inc
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 Industrial Research Prod Inc filed Critical Industrial Research Prod Inc
Publication of CH587594A5 publication Critical patent/CH587594A5/xx

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
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/402—Arrangements for obtaining a desired directivity characteristic using contructional means
    • 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
CH158974A 1973-02-05 1974-02-05 CH587594A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00329673A US3835263A (en) 1973-02-05 1973-02-05 Microphone assembly operable in directional and non-directional modes

Publications (1)

Publication Number Publication Date
CH587594A5 true CH587594A5 (en) 1977-05-13

Family

ID=23286501

Family Applications (1)

Application Number Title Priority Date Filing Date
CH158974A CH587594A5 (en) 1973-02-05 1974-02-05

Country Status (9)

Country Link
US (1) US3835263A (en)
JP (1) JPS5317444B2 (en)
AT (1) AT332465B (en)
CA (1) CA991738A (en)
CH (1) CH587594A5 (en)
DK (1) DK149294C (en)
FR (1) FR2216745B1 (en)
GB (1) GB1430200A (en)
NL (1) NL167832C (en)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006321A (en) * 1974-02-20 1977-02-01 Industrial Research Products, Inc. Transducer coupling system
US3909556A (en) * 1974-08-08 1975-09-30 Audivox Inc Directionally variable hearing aid
US4763753A (en) * 1984-07-05 1988-08-16 Etymotic Research, Inc. Insert earphones for audiometry
DE8529458U1 (en) * 1985-10-16 1987-05-07 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
CA1331803C (en) * 1988-12-21 1994-08-30 Murray A. Davis Hearing aid
EP0547138B1 (en) * 1990-09-06 1996-06-26 BRITISH TELECOMMUNICATIONS public limited company Noise-cancelling handset
US5204907A (en) * 1991-05-28 1993-04-20 Motorola, Inc. Noise cancelling microphone and boot mounting arrangement
JPH067205A (en) * 1992-06-26 1994-01-18 Ngk Insulators Ltd Metallic inner cushion for shoes
US5524056A (en) * 1993-04-13 1996-06-04 Etymotic Research, Inc. Hearing aid having plural microphones and a microphone switching system
US6151399A (en) 1996-12-31 2000-11-21 Etymotic Research, Inc. Directional microphone system providing for ease of assembly and disassembly
US5878147A (en) 1996-12-31 1999-03-02 Etymotic Research, Inc. Directional microphone assembly
US7881486B1 (en) * 1996-12-31 2011-02-01 Etymotic Research, Inc. Directional microphone assembly
AU4567099A (en) * 1998-07-01 2000-01-24 Resound Corporation External microphone protective membrane
US6597793B1 (en) 1998-08-06 2003-07-22 Resistance Technology, Inc. Directional/omni-directional hearing aid microphone and housing
US6690806B1 (en) * 1999-04-01 2004-02-10 Resistance Technology, Inc. Various directional/omni-directional hearing aid microphone and housing structures
WO2000079835A1 (en) * 1999-06-16 2000-12-28 Phonak Ag Hearing-aid, worn behind the ear
US6876749B1 (en) * 1999-07-12 2005-04-05 Etymotic Research, Inc. Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics
US20020001391A1 (en) * 2000-03-16 2002-01-03 Resistance Technology, Inc. Acoustic switch with electronic switching capability
DE20009593U1 (en) * 2000-05-30 2000-08-10 Audio Service Gmbh As Hearing aid bracket for BTE hearing aids
WO2002030156A1 (en) 2000-10-05 2002-04-11 Etymotic Research, Inc. Directional microphone assembly
US7136497B2 (en) * 2002-04-17 2006-11-14 Knowles Electronics, Llc. Acoustical switch for a directional microphone
US7072482B2 (en) 2002-09-06 2006-07-04 Sonion Nederland B.V. Microphone with improved sound inlet port
US7751579B2 (en) * 2003-06-13 2010-07-06 Etymotic Research, Inc. Acoustically transparent debris barrier for audio transducers
US7233679B2 (en) * 2003-09-30 2007-06-19 Motorola, Inc. Microphone system for a communication device
US20060274909A1 (en) * 2003-10-03 2006-12-07 Oticon A/S Hearing aid with printed circuit board and microphone suspension
NL2000085C2 (en) * 2006-06-02 2007-12-04 Varibel B V Glasses with hearing aids that only use one omnidirectional microphone per ear bracket.
US8111839B2 (en) * 2007-04-09 2012-02-07 Personics Holdings Inc. Always on headwear recording system
US7832080B2 (en) * 2007-10-11 2010-11-16 Etymotic Research, Inc. Directional microphone assembly
EP2345259B1 (en) * 2008-10-10 2021-03-17 Knowles IPC (M) Sdn. Bhd. Acoustic valve mechanisms
US8447054B2 (en) * 2009-11-11 2013-05-21 Analog Devices, Inc. Microphone with variable low frequency cutoff
DE102009056916B4 (en) * 2009-12-03 2011-07-21 Siemens Medical Instruments Pte. Ltd. Hearing aid with a space-saving arrangement of microphones and sound openings
US20130177192A1 (en) * 2011-10-25 2013-07-11 Knowles Electronics, Llc Vented Microphone Module
WO2014152786A1 (en) 2013-03-14 2014-09-25 Robert Bosch Gmbh Digital acoustic low frequency response control for mems microphones
US9859879B2 (en) 2015-09-11 2018-01-02 Knowles Electronics, Llc Method and apparatus to clip incoming signals in opposing directions when in an off state
CN107249157A (en) * 2017-08-09 2017-10-13 陆文胜 One kind orientation noise cancelling headphone microphone
DE102018221726A1 (en) 2017-12-29 2019-07-04 Knowles Electronics, Llc Audio device with acoustic valve
DE102018221725A1 (en) 2018-01-08 2019-07-11 Knowles Electronics, Llc Audio device with valve state management
US10932069B2 (en) 2018-04-12 2021-02-23 Knowles Electronics, Llc Acoustic valve for hearing device
WO2020105443A1 (en) 2018-11-20 2020-05-28 東レ株式会社 Protective clothing
US11102576B2 (en) 2018-12-31 2021-08-24 Knowles Electronicis, LLC Audio device with audio signal processing based on acoustic valve state
US10917731B2 (en) 2018-12-31 2021-02-09 Knowles Electronics, Llc Acoustic valve for hearing device
US11774320B1 (en) * 2022-11-18 2023-10-03 xMEMS Labs, Inc. Acoustic impedance measuring system and acoustic impedance measuring method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3770911A (en) * 1972-07-21 1973-11-06 Industrial Research Prod Inc Hearing aid system

Also Published As

Publication number Publication date
DE2400666A1 (en) 1974-08-08
JPS49107723A (en) 1974-10-14
US3835263A (en) 1974-09-10
DK149294B (en) 1986-04-21
JPS5317444B2 (en) 1978-06-08
AU6048473A (en) 1975-03-20
DE2400666B2 (en) 1977-05-18
FR2216745A1 (en) 1974-08-30
DK149294C (en) 1986-09-29
NL167832C (en) 1982-01-18
ATA820273A (en) 1976-01-15
CA991738A (en) 1976-06-22
FR2216745B1 (en) 1978-11-17
NL7317130A (en) 1974-08-07
GB1430200A (en) 1976-03-31
NL167832B (en) 1981-08-17
AT332465B (en) 1976-09-27

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Legal Events

Date Code Title Description
PUE Assignment

Owner name: KNOWLES ELECTRONICS, INC.

PL Patent ceased