JPS6442966A - Telephone set - Google Patents
Telephone setInfo
- Publication number
- JPS6442966A JPS6442966A JP19952487A JP19952487A JPS6442966A JP S6442966 A JPS6442966 A JP S6442966A JP 19952487 A JP19952487 A JP 19952487A JP 19952487 A JP19952487 A JP 19952487A JP S6442966 A JPS6442966 A JP S6442966A
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- surrounding noise
- output
- unidirectional
- moving piece
- 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.)
- Pending
Links
Abstract
PURPOSE:To collect a transmission tone easily by leading out a 2nd microphone to cancel surrounding noise only when the surrounding noise is large to cancel the surrounding noise inputted from a mouthpiece and approaching the mouthpiece toward the mouth of a talker. CONSTITUTION:A nondirectivity microphone 6 for transmission and a unidirectional microphone 7 directed in a direction deviated from a direction of the location of a receiver 3 close to the nondirective microphone 6 are fitted to a moving piece 5 and the moving piece 5 is provided so that a sound collection hole of the unidirectional microphone 7 appears or disappears from/to the handset 1 movably to the handset 1. A switch 10 turning on the unidirectional microphone 7 is provided while the moving piece is projected and a subtraction means using an output being the subtraction of the output of the unidirectional microphone 7 from the output of the nondirectional microphone 6 as the transmission output is provided in setting the unidirectional microphone 7. Thus, in using the telephone set with large surrounding noise, the surrounding noise is cancelled to prevent the deterioration in the talking quality.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19952487A JPS6442966A (en) | 1987-08-10 | 1987-08-10 | Telephone set |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19952487A JPS6442966A (en) | 1987-08-10 | 1987-08-10 | Telephone set |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6442966A true JPS6442966A (en) | 1989-02-15 |
Family
ID=16409261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19952487A Pending JPS6442966A (en) | 1987-08-10 | 1987-08-10 | Telephone set |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6442966A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06224987A (en) * | 1992-10-29 | 1994-08-12 | Andrea Electron Corp | Noise canceler |
JPH0865367A (en) * | 1994-08-16 | 1996-03-08 | Nec Corp | Portable communication equipment |
US5625684A (en) * | 1993-02-04 | 1997-04-29 | Local Silence, Inc. | Active noise suppression system for telephone handsets and method |
US5664014A (en) * | 1992-10-20 | 1997-09-02 | Pan Communications, Inc. | Two-way communications earset |
WO2002051104A1 (en) * | 2000-12-21 | 2002-06-27 | Thales Defence Limited | Audio handheld device |
-
1987
- 1987-08-10 JP JP19952487A patent/JPS6442966A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5664014A (en) * | 1992-10-20 | 1997-09-02 | Pan Communications, Inc. | Two-way communications earset |
JPH06224987A (en) * | 1992-10-29 | 1994-08-12 | Andrea Electron Corp | Noise canceler |
US5625684A (en) * | 1993-02-04 | 1997-04-29 | Local Silence, Inc. | Active noise suppression system for telephone handsets and method |
JPH0865367A (en) * | 1994-08-16 | 1996-03-08 | Nec Corp | Portable communication equipment |
WO2002051104A1 (en) * | 2000-12-21 | 2002-06-27 | Thales Defence Limited | Audio handheld device |
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