GB1180865A - Improvements in Directional Microphones for use in Hearing Aids. - Google Patents

Improvements in Directional Microphones for use in Hearing Aids.

Info

Publication number
GB1180865A
GB1180865A GB20205/68A GB2020568A GB1180865A GB 1180865 A GB1180865 A GB 1180865A GB 20205/68 A GB20205/68 A GB 20205/68A GB 2020568 A GB2020568 A GB 2020568A GB 1180865 A GB1180865 A GB 1180865A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
resistance
sound entry
plastics material
metal
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
Application number
GB20205/68A
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.)
WILLCO HORGERATE MEDIZINISCHE
Original Assignee
WILLCO HORGERATE MEDIZINISCHE
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 WILLCO HORGERATE MEDIZINISCHE filed Critical WILLCO HORGERATE MEDIZINISCHE
Publication of GB1180865A publication Critical patent/GB1180865A/en
Expired legal-status Critical Current

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

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

1,180,865. Microphones. WILLCO-HÍRGER€TE MEDIZINISCHE APPARATEBAU G.m.b.H. 29 April, 1968 [5 June, 1967], No. 20205/68. Heading H4J. A directional microphone for a hearing aid to be worn on the user's head, e.g. of spectacles or behind-the-ear type, has acoustic resistance in the form of a plurality of narrow passages 8 in parallel with one another in a chamber 1 through which pass the sound waves coming from a rear sound entry opening 9 to the rear surface of the diaphragm 4. The front and rear surfaces of the diaphragm 4 face a front sound entry 6 and the rear sound entry 9, respectively. The diaphragm 4 is connected to a transducer 2, e.g. of electromagnetic or piezo-electric type. The resistance may be capillary tubes of glass, metal or synthetic plastics material, stuck or sintered together. Alternatively, the resistance may be formed by a bunch of hairs or by metal or synthetic plastics material corrugated foils rolled or folded or stacked as small plates, preferably in a honeycomb arrangement.
GB20205/68A 1967-06-05 1968-04-29 Improvements in Directional Microphones for use in Hearing Aids. Expired GB1180865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW44116A DE1277347B (en) 1967-06-05 1967-06-05 Microphone for hearing aids

Publications (1)

Publication Number Publication Date
GB1180865A true GB1180865A (en) 1970-02-11

Family

ID=7603933

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20205/68A Expired GB1180865A (en) 1967-06-05 1968-04-29 Improvements in Directional Microphones for use in Hearing Aids.

Country Status (9)

Country Link
US (1) US3662124A (en)
AT (1) AT309551B (en)
BE (1) BE716073A (en)
CH (1) CH491575A (en)
DE (1) DE1277347B (en)
ES (1) ES353937A1 (en)
FR (1) FR1568515A (en)
GB (1) GB1180865A (en)
NL (1) NL6807102A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1278009A (en) * 1970-10-22 1972-06-14 Standard Telephones Cables Ltd Microphone
US3749853A (en) * 1972-05-18 1973-07-31 Zenith Radio Corp Hearing aid with directional microphone system
NL7306005A (en) * 1973-05-01 1974-11-05
US3963881A (en) * 1973-05-29 1976-06-15 Thermo Electron Corporation Unidirectional condenser microphone
US4903249A (en) * 1988-03-24 1990-02-20 Nelson Industries Rigid foraminous microphone probe for acoustic measurement in turbulent flow
US6031922A (en) * 1995-12-27 2000-02-29 Tibbetts Industries, Inc. Microphone systems of reduced in situ acceleration sensitivity
US7881486B1 (en) * 1996-12-31 2011-02-01 Etymotic Research, Inc. Directional microphone assembly
US5878147A (en) 1996-12-31 1999-03-02 Etymotic Research, Inc. Directional microphone assembly
US6151399A (en) 1996-12-31 2000-11-21 Etymotic Research, Inc. Directional microphone system providing for ease of assembly and disassembly
WO2002030156A1 (en) 2000-10-05 2002-04-11 Etymotic Research, Inc. Directional microphone assembly
US7894618B2 (en) * 2006-07-28 2011-02-22 Symphony Acoustics, Inc. Apparatus comprising a directionality-enhanced acoustic sensor
US7832080B2 (en) * 2007-10-11 2010-11-16 Etymotic Research, Inc. Directional microphone assembly
US8630435B2 (en) * 2008-08-08 2014-01-14 Nokia Corporation Apparatus incorporating an adsorbent material, and methods of making same
CN106664495B (en) 2014-07-31 2019-10-15 3M创新有限公司 Waterproofness sound port in ear type hearing devices

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL67077C (en) * 1945-12-03

Also Published As

Publication number Publication date
FR1568515A (en) 1969-05-23
DE1277347B (en) 1968-09-12
AT309551B (en) 1973-08-27
ES353937A1 (en) 1969-10-16
US3662124A (en) 1972-05-09
BE716073A (en) 1968-11-04
CH491575A (en) 1970-05-31
NL6807102A (en) 1968-12-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees