JPH0158690B2 - - Google Patents

Info

Publication number
JPH0158690B2
JPH0158690B2 JP13549781A JP13549781A JPH0158690B2 JP H0158690 B2 JPH0158690 B2 JP H0158690B2 JP 13549781 A JP13549781 A JP 13549781A JP 13549781 A JP13549781 A JP 13549781A JP H0158690 B2 JPH0158690 B2 JP H0158690B2
Authority
JP
Japan
Prior art keywords
circuit
output
external noise
level
detection circuit
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
Application number
JP13549781A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5838010A (ja
Inventor
Tetsuya Takizawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BIIBA KK
Original Assignee
BIIBA KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BIIBA KK filed Critical BIIBA KK
Priority to JP13549781A priority Critical patent/JPS5838010A/ja
Publication of JPS5838010A publication Critical patent/JPS5838010A/ja
Publication of JPH0158690B2 publication Critical patent/JPH0158690B2/ja
Granted legal-status Critical Current

Links

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)
JP13549781A 1981-08-31 1981-08-31 自動音量調整装置のマスキング緩和方法 Granted JPS5838010A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13549781A JPS5838010A (ja) 1981-08-31 1981-08-31 自動音量調整装置のマスキング緩和方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13549781A JPS5838010A (ja) 1981-08-31 1981-08-31 自動音量調整装置のマスキング緩和方法

Publications (2)

Publication Number Publication Date
JPS5838010A JPS5838010A (ja) 1983-03-05
JPH0158690B2 true JPH0158690B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-12-13

Family

ID=15153118

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13549781A Granted JPS5838010A (ja) 1981-08-31 1981-08-31 自動音量調整装置のマスキング緩和方法

Country Status (1)

Country Link
JP (1) JPS5838010A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3482123B2 (ja) 1998-04-27 2003-12-22 富士通テン株式会社 音響装置
JP6401914B2 (ja) * 2014-02-05 2018-10-10 東日本旅客鉄道株式会社 音量制御装置及び駅ホームの放送システム

Also Published As

Publication number Publication date
JPS5838010A (ja) 1983-03-05

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