JPH0145769B2 - - Google Patents
Info
- Publication number
- JPH0145769B2 JPH0145769B2 JP17375682A JP17375682A JPH0145769B2 JP H0145769 B2 JPH0145769 B2 JP H0145769B2 JP 17375682 A JP17375682 A JP 17375682A JP 17375682 A JP17375682 A JP 17375682A JP H0145769 B2 JPH0145769 B2 JP H0145769B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- loss
- variable
- level
- level detection
- 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
- 238000001514 detection method Methods 0.000 claims description 26
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 206010019133 Hangover Diseases 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Circuit For Audible Band Transducer (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17375682A JPS5977710A (ja) | 1982-10-02 | 1982-10-02 | マイクロホン増巾回路 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17375682A JPS5977710A (ja) | 1982-10-02 | 1982-10-02 | マイクロホン増巾回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5977710A JPS5977710A (ja) | 1984-05-04 |
JPH0145769B2 true JPH0145769B2 (fr) | 1989-10-04 |
Family
ID=15966550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17375682A Granted JPS5977710A (ja) | 1982-10-02 | 1982-10-02 | マイクロホン増巾回路 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5977710A (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60126950A (ja) * | 1983-12-13 | 1985-07-06 | Toshiba Corp | 拡声電話装置 |
JPS61208951A (ja) * | 1985-03-13 | 1986-09-17 | Sharp Corp | 拡声電話機 |
JPS61242499A (ja) * | 1985-04-19 | 1986-10-28 | シユア・ブラザ−ズ・インコ−ポレイテツド | マイクロホン装置 |
JPS6339249A (ja) * | 1986-08-05 | 1988-02-19 | Nec Corp | 周囲騒音感応型電話機 |
EP0290952B1 (fr) * | 1987-05-15 | 1992-11-04 | Alcatel SEL Aktiengesellschaft | Montage pour commande de la parole pour un terminal de télécommunication |
US4959857A (en) * | 1988-12-28 | 1990-09-25 | At&T Bell Laboratories | Acoustic calibration arrangement for a voice switched speakerphone |
EP0419127A3 (en) * | 1989-09-20 | 1991-10-09 | Gennum Corporation | Noise suppression system |
JPH0744881U (ja) * | 1992-12-25 | 1995-11-28 | ホシデン株式会社 | マイクロホン用増幅器 |
EP1806840A1 (fr) * | 2006-01-05 | 2007-07-11 | Siemens Schweiz AG | Gain adaptatif pour l'ajustement du volume de la voix |
JP5688547B2 (ja) | 2010-11-22 | 2015-03-25 | パナソニックIpマネジメント株式会社 | 音声処理装置、収音装置及び撮像装置 |
-
1982
- 1982-10-02 JP JP17375682A patent/JPS5977710A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5977710A (ja) | 1984-05-04 |
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