JPH0326926B2 - - Google Patents

Info

Publication number
JPH0326926B2
JPH0326926B2 JP59168293A JP16829384A JPH0326926B2 JP H0326926 B2 JPH0326926 B2 JP H0326926B2 JP 59168293 A JP59168293 A JP 59168293A JP 16829384 A JP16829384 A JP 16829384A JP H0326926 B2 JPH0326926 B2 JP H0326926B2
Authority
JP
Japan
Prior art keywords
signal
announcement
noise
level
input
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 - Lifetime
Application number
JP59168293A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6146605A (ja
Inventor
Ikuo Matsuyama
Hiroo Mafune
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP16829384A priority Critical patent/JPS6146605A/ja
Publication of JPS6146605A publication Critical patent/JPS6146605A/ja
Publication of JPH0326926B2 publication Critical patent/JPH0326926B2/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
    • H03G3/22—Automatic control in amplifiers having discharge tubes
    • H03G3/24—Control dependent upon ambient noise level or sound level

Landscapes

  • Control Of Amplification And Gain Control (AREA)
JP16829384A 1984-08-11 1984-08-11 自動音量調整装置 Granted JPS6146605A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16829384A JPS6146605A (ja) 1984-08-11 1984-08-11 自動音量調整装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16829384A JPS6146605A (ja) 1984-08-11 1984-08-11 自動音量調整装置

Publications (2)

Publication Number Publication Date
JPS6146605A JPS6146605A (ja) 1986-03-06
JPH0326926B2 true JPH0326926B2 (ko) 1991-04-12

Family

ID=15865322

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16829384A Granted JPS6146605A (ja) 1984-08-11 1984-08-11 自動音量調整装置

Country Status (1)

Country Link
JP (1) JPS6146605A (ko)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55140311A (en) * 1979-04-19 1980-11-01 Toa Tokushu Denki Kk Sound volume automatic control unit of noise control type speaker

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55140311A (en) * 1979-04-19 1980-11-01 Toa Tokushu Denki Kk Sound volume automatic control unit of noise control type speaker

Also Published As

Publication number Publication date
JPS6146605A (ja) 1986-03-06

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