DE2831401C2 - - Google Patents
Info
- Publication number
- DE2831401C2 DE2831401C2 DE19782831401 DE2831401A DE2831401C2 DE 2831401 C2 DE2831401 C2 DE 2831401C2 DE 19782831401 DE19782831401 DE 19782831401 DE 2831401 A DE2831401 A DE 2831401A DE 2831401 C2 DE2831401 C2 DE 2831401C2
- Authority
- DE
- Germany
- 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
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- 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
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/02—Microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Telephone Set Structure (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782831401 DE2831401A1 (de) | 1978-07-17 | 1978-07-17 | Elektroakustischer wandler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782831401 DE2831401A1 (de) | 1978-07-17 | 1978-07-17 | Elektroakustischer wandler |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2831401A1 DE2831401A1 (de) | 1980-01-31 |
DE2831401C2 true DE2831401C2 (US07922777-20110412-C00004.png) | 1987-03-19 |
Family
ID=6044612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19782831401 Granted DE2831401A1 (de) | 1978-07-17 | 1978-07-17 | Elektroakustischer wandler |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2831401A1 (US07922777-20110412-C00004.png) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19626933A1 (de) * | 1996-07-04 | 1998-01-08 | Deutsche Telekom Ag | Handapparat für Telefone |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3232177A1 (de) * | 1982-08-30 | 1984-03-01 | Siemens AG, 1000 Berlin und 8000 München | Piezoelektrischer wandler |
US4843628A (en) * | 1986-07-10 | 1989-06-27 | Stanton Magnetics, Inc. | Inertial microphone/receiver with extended frequency response |
WO1989004106A1 (en) * | 1987-10-28 | 1989-05-05 | Acs Communications, Inc. | Acoustic filter microphone cup |
US4905276A (en) * | 1988-06-15 | 1990-02-27 | Harry Catey | Telephone earpiece extension attachment |
JPH0727715Y2 (ja) * | 1989-02-06 | 1995-06-21 | 株式会社東芝 | ハンドセット |
US5231659A (en) * | 1989-05-16 | 1993-07-27 | Alcatel Business Systems | Telephone handset with transducer assembly |
AT400910B (de) | 1994-06-16 | 1996-04-25 | Akg Akustische Kino Geraete | Akustischer widerstand, insbesondere für elektroakustische wandler |
-
1978
- 1978-07-17 DE DE19782831401 patent/DE2831401A1/de active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19626933A1 (de) * | 1996-07-04 | 1998-01-08 | Deutsche Telekom Ag | Handapparat für Telefone |
DE19626933C2 (de) * | 1996-07-04 | 2000-09-14 | Deutsche Telekom Ag | Handapparat für Telefone |
DE19626933C5 (de) * | 1996-07-04 | 2009-08-06 | Deutsche Telekom Ag | Handapparat für Telefone |
Also Published As
Publication number | Publication date |
---|---|
DE2831401A1 (de) | 1980-01-31 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |