GB1296137A - - Google Patents
Info
- Publication number
- GB1296137A GB1296137A GB1296137DA GB1296137A GB 1296137 A GB1296137 A GB 1296137A GB 1296137D A GB1296137D A GB 1296137DA GB 1296137 A GB1296137 A GB 1296137A
- Authority
- GB
- United Kingdom
- Prior art keywords
- receiver
- microphone
- pressure
- gradient
- hearing aid
- 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
- 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
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/406—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers microphones
-
- 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
- H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
- H04R25/456—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback mechanically
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
1296137 Deaf aids K SCHOEPS 6 April 1970 [29 July 1969] 16174/70 Heading H4J A hearing aid employs an electrostatic microphone and a directional receiver and is arranged to eliminate acoustic feedback. As described the polarization voltage for the microphone is provided by an electret, by a direct current transformer or a separate power source. The output of the microphone is amplified by a fieldeffect transistor which may be in an integrated circuit. The receiver is either a pressure gradient receiver or a pressure gradient/pressure receiver. The direction of orientation of the receiver relative to the microphone is such as to reduce acoustic feedback. The directional characteristics may be adjustable by the wearer. It is stated that for electrostatic receivers of the pressure type elastic damping is required and for those of pressure-gradient type frictionchecked damping is required and that this is compatible with the small dimensions of a hearing aid allowing the resonance points of the aid to be outside the transmission range.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691938435 DE1938435B2 (en) | 1969-07-29 | 1969-07-29 | Hearing aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1296137A true GB1296137A (en) | 1972-11-15 |
Family
ID=5741216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1296137D Expired GB1296137A (en) | 1969-07-29 | 1970-04-06 |
Country Status (6)
| Country | Link |
|---|---|
| CH (1) | CH532876A (en) |
| DE (1) | DE1938435B2 (en) |
| FR (1) | FR2053232B1 (en) |
| GB (1) | GB1296137A (en) |
| NL (1) | NL7004267A (en) |
| SE (1) | SE370484B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7103191B1 (en) | 1993-04-13 | 2006-09-05 | Etymotic Research, Inc. | Hearing aid having second order directional response |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT407815B (en) * | 1990-07-13 | 2001-06-25 | Viennatone Gmbh | HEARING AID |
| CH681411A5 (en) * | 1991-02-20 | 1993-03-15 | Phonak Ag |
-
1969
- 1969-07-29 DE DE19691938435 patent/DE1938435B2/en active Pending
-
1970
- 1970-03-25 NL NL7004267A patent/NL7004267A/xx unknown
- 1970-04-03 SE SE458670A patent/SE370484B/xx unknown
- 1970-04-06 GB GB1296137D patent/GB1296137A/en not_active Expired
- 1970-06-26 FR FR7023907A patent/FR2053232B1/fr not_active Expired
- 1970-07-06 CH CH1016470A patent/CH532876A/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7103191B1 (en) | 1993-04-13 | 2006-09-05 | Etymotic Research, Inc. | Hearing aid having second order directional response |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1938435B2 (en) | 1974-05-02 |
| CH532876A (en) | 1973-01-15 |
| NL7004267A (en) | 1971-02-02 |
| FR2053232A1 (en) | 1971-04-16 |
| FR2053232B1 (en) | 1976-09-24 |
| SE370484B (en) | 1974-10-14 |
| DE1938435A1 (en) | 1971-02-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 414F | Notice of opposition given (sect. 14/1949) | ||
| PS | Patent sealed | ||
| 414E | Application relinquished (sect. 14/1949) | ||
| CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |