JPS5720733B2 - - Google Patents
Info
- Publication number
- JPS5720733B2 JPS5720733B2 JP14253873A JP14253873A JPS5720733B2 JP S5720733 B2 JPS5720733 B2 JP S5720733B2 JP 14253873 A JP14253873 A JP 14253873A JP 14253873 A JP14253873 A JP 14253873A JP S5720733 B2 JPS5720733 B2 JP S5720733B2
- Authority
- JP
- Japan
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
-
- 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
- H04R1/326—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for microphones
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00317241A US3830988A (en) | 1972-12-21 | 1972-12-21 | Noise canceling transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS49116999A JPS49116999A (ja) | 1974-11-08 |
| JPS5720733B2 true JPS5720733B2 (ja) | 1982-05-01 |
Family
ID=23232760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14253873A Expired JPS5720733B2 (ja) | 1972-12-21 | 1973-12-21 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3830988A (ja) |
| JP (1) | JPS5720733B2 (ja) |
| CA (1) | CA982684A (ja) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1082828A (en) * | 1976-02-23 | 1980-07-29 | Western Electric Company, Incorporated | Telephone set |
| JPS6017191B2 (ja) * | 1977-12-30 | 1985-05-01 | アイホン株式会社 | 風雑音減衰効果を有するマイクロンホンユニツト |
| US4163875A (en) * | 1978-02-09 | 1979-08-07 | Northern Telecom Limited | Telephone handset with transmitter having a one piece gasket for sealing and holding of transmitter members |
| US4288663A (en) * | 1980-03-05 | 1981-09-08 | Roanwell Corporation | Noise canceling transmitter |
| US4463222A (en) * | 1981-12-23 | 1984-07-31 | Roanwell Corporation | Noise canceling transmitter |
| US4449236A (en) * | 1982-04-08 | 1984-05-15 | Walker Equipment Corporation | Anti-side tone transmitter |
| US4584702A (en) * | 1983-12-19 | 1986-04-22 | Walker Equipment Corporation | Noise cancelling telephone transmitter insertable in telephone handset receptacle |
| US4773091A (en) * | 1986-06-16 | 1988-09-20 | Northern Telecom Limited | Telephone handset for use in noisy locations |
| US5239578A (en) * | 1990-05-15 | 1993-08-24 | Plantronics, Inc. | Noise cancelling apparatus for a telephone handset |
| US5381473A (en) * | 1992-10-29 | 1995-01-10 | Andrea Electronics Corporation | Noise cancellation apparatus |
| US5673325A (en) * | 1992-10-29 | 1997-09-30 | Andrea Electronics Corporation | Noise cancellation apparatus |
| US5732143A (en) * | 1992-10-29 | 1998-03-24 | Andrea Electronics Corp. | Noise cancellation apparatus |
| US5226076A (en) * | 1993-02-28 | 1993-07-06 | At&T Bell Laboratories | Directional microphone assembly |
| JP2000082522A (ja) * | 1998-09-08 | 2000-03-21 | Smk Corp | 電子部品接続用コネクタ |
| US6363345B1 (en) | 1999-02-18 | 2002-03-26 | Andrea Electronics Corporation | System, method and apparatus for cancelling noise |
| US6594367B1 (en) | 1999-10-25 | 2003-07-15 | Andrea Electronics Corporation | Super directional beamforming design and implementation |
| US11245982B2 (en) * | 2020-06-22 | 2022-02-08 | Gopro, Inc. | Wind noise reduction by microphone placement |
| USD901459S1 (en) * | 2020-07-15 | 2020-11-10 | Yang Zhao | Microphone pop filter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4183Y1 (ja) * | 1965-03-22 | 1966-01-07 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH473515A (de) * | 1968-04-23 | 1969-05-31 | Peiker Acustic | Mikrotelephon |
| US3733441A (en) * | 1971-06-14 | 1973-05-15 | Electro Voice | Ambipolar microphone unit |
-
1972
- 1972-12-21 US US00317241A patent/US3830988A/en not_active Expired - Lifetime
-
1973
- 1973-12-20 CA CA188,640A patent/CA982684A/en not_active Expired
- 1973-12-21 JP JP14253873A patent/JPS5720733B2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4183Y1 (ja) * | 1965-03-22 | 1966-01-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| CA982684A (en) | 1976-01-27 |
| JPS49116999A (ja) | 1974-11-08 |
| US3830988A (en) | 1974-08-20 |