CH236665A - Electroacoustic transmission system for noisy playback locations. - Google Patents

Electroacoustic transmission system for noisy playback locations.

Info

Publication number
CH236665A
CH236665A CH236665DA CH236665A CH 236665 A CH236665 A CH 236665A CH 236665D A CH236665D A CH 236665DA CH 236665 A CH236665 A CH 236665A
Authority
CH
Switzerland
Prior art keywords
noisy
transmission system
playback locations
electroacoustic transmission
electroacoustic
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Albiswerk Zuerich
Original Assignee
Siemens Ag Albis
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 Siemens Ag Albis filed Critical Siemens Ag Albis
Publication of CH236665A publication Critical patent/CH236665A/en

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
CH236665D 1942-10-07 1942-10-07 Electroacoustic transmission system for noisy playback locations. CH236665A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH236665T 1942-10-07

Publications (1)

Publication Number Publication Date
CH236665A true CH236665A (en) 1945-02-28

Family

ID=4459559

Family Applications (1)

Application Number Title Priority Date Filing Date
CH236665D CH236665A (en) 1942-10-07 1942-10-07 Electroacoustic transmission system for noisy playback locations.

Country Status (1)

Country Link
CH (1) CH236665A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034696B (en) * 1956-04-27 1958-07-24 Telefunken Gmbh Intercom system for speaking in rooms with a high level of interference
DE1257208B (en) * 1962-04-30 1967-12-28 Fujio Suganuma Automatic volume control for an electro-acoustic loudspeaker system
DE2321765A1 (en) * 1972-10-16 1974-05-02 Rion Co HOER AID

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034696B (en) * 1956-04-27 1958-07-24 Telefunken Gmbh Intercom system for speaking in rooms with a high level of interference
DE1257208B (en) * 1962-04-30 1967-12-28 Fujio Suganuma Automatic volume control for an electro-acoustic loudspeaker system
DE2321765A1 (en) * 1972-10-16 1974-05-02 Rion Co HOER AID
DE2321765C3 (en) * 1972-10-16 1988-07-07 Rion K.K., Kokubunji, Tokio/Tokyo Hearing aid device

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