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
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)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (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.
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)
| 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 |
| ATE548862T1 (en) | 2000-10-05 | 2012-03-15 | Etymotic Res 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 |
| KR101786434B1 (en) | 2014-07-31 | 2017-10-17 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Water resistant acoustic port in ear-mounted hearing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL67077C (en) * | 1945-12-03 |
-
1967
- 1967-06-05 DE DEW44116A patent/DE1277347B/en active Pending
-
1968
- 1968-04-16 AT AT371068A patent/AT309551B/en not_active IP Right Cessation
- 1968-04-29 GB GB20205/68A patent/GB1180865A/en not_active Expired
- 1968-05-06 CH CH671468A patent/CH491575A/en not_active IP Right Cessation
- 1968-05-16 ES ES353937A patent/ES353937A1/en not_active Expired
- 1968-05-20 NL NL6807102A patent/NL6807102A/xx unknown
- 1968-05-31 FR FR1568515D patent/FR1568515A/fr not_active Expired
- 1968-06-04 BE BE716073D patent/BE716073A/xx unknown
-
1970
- 1970-09-25 US US75548A patent/US3662124A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3662124A (en) | 1972-05-09 |
| CH491575A (en) | 1970-05-31 |
| ES353937A1 (en) | 1969-10-16 |
| FR1568515A (en) | 1969-05-23 |
| AT309551B (en) | 1973-08-27 |
| BE716073A (en) | 1968-11-04 |
| NL6807102A (en) | 1968-12-06 |
| DE1277347B (en) | 1968-09-12 |
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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 |