FR714252A - Improvements to devices for adjusting sound volume - Google Patents

Improvements to devices for adjusting sound volume

Info

Publication number
FR714252A
FR714252A FR714252DA FR714252A FR 714252 A FR714252 A FR 714252A FR 714252D A FR714252D A FR 714252DA FR 714252 A FR714252 A FR 714252A
Authority
FR
France
Prior art keywords
devices
sound volume
adjusting sound
adjusting
volume
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
Other languages
French (fr)
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.)
Societe Francaise Radio Electrique
Original Assignee
Societe Francaise Radio Electrique
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 Societe Francaise Radio Electrique filed Critical Societe Francaise Radio Electrique
Application granted granted Critical
Publication of FR714252A publication Critical patent/FR714252A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/24—Frequency- independent attenuators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
FR714252D 1931-06-22 1930-07-03 Improvements to devices for adjusting sound volume Expired FR714252A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR41242T 1931-06-22

Publications (1)

Publication Number Publication Date
FR714252A true FR714252A (en) 1931-11-10

Family

ID=8677423

Family Applications (2)

Application Number Title Priority Date Filing Date
FR714252D Expired FR714252A (en) 1931-06-22 1930-07-03 Improvements to devices for adjusting sound volume
FR41242D Expired FR41242E (en) 1931-06-22 1931-06-22 Improvements to devices for adjusting sound volume

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR41242D Expired FR41242E (en) 1931-06-22 1931-06-22 Improvements to devices for adjusting sound volume

Country Status (4)

Country Link
US (1) US1912719A (en)
BE (2) BE388757A (en)
FR (2) FR714252A (en)
GB (1) GB390486A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125677A (en) * 1953-07-20 1964-03-17 Certificate of correction
US3453529A (en) * 1967-02-17 1969-07-01 Weston Instruments Inc Attenuators having constant output resistance
US3478259A (en) * 1967-07-06 1969-11-11 Frank R Bradley Voltage divider with constant source impedance stages
US4021614A (en) * 1974-12-30 1977-05-03 Teledyne, Inc. Woofer equalizer
JPH01305612A (en) * 1988-06-02 1989-12-08 Toshiba Corp Attenuator

Also Published As

Publication number Publication date
BE380796A (en)
GB390486A (en) 1933-04-06
BE388757A (en)
US1912719A (en) 1933-06-06
FR41242E (en) 1932-12-02

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