FR919990A - Improvement of the sound recording and reproduction control system - Google Patents

Improvement of the sound recording and reproduction control system

Info

Publication number
FR919990A
FR919990A FR919990DA FR919990A FR 919990 A FR919990 A FR 919990A FR 919990D A FR919990D A FR 919990DA FR 919990 A FR919990 A FR 919990A
Authority
FR
France
Prior art keywords
improvement
control system
reproduction control
sound recording
sound
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.)
Dictaphone Corp
Original Assignee
Dictaphone Corp
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 Dictaphone Corp filed Critical Dictaphone Corp
Application granted granted Critical
Publication of FR919990A publication Critical patent/FR919990A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/18—Automatic control in untuned amplifiers
    • H03G5/22—Automatic control in untuned amplifiers having semiconductor devices
FR919990D 1946-01-12 1946-01-12 Improvement of the sound recording and reproduction control system Expired FR919990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR919990T 1946-01-12

Publications (1)

Publication Number Publication Date
FR919990A true FR919990A (en) 1947-03-24

Family

ID=9425371

Family Applications (1)

Application Number Title Priority Date Filing Date
FR919990D Expired FR919990A (en) 1946-01-12 1946-01-12 Improvement of the sound recording and reproduction control system

Country Status (1)

Country Link
FR (1) FR919990A (en)

Similar Documents

Publication Publication Date Title
FR982822A (en) Amplifier system
NL171847B (en) SOUND RECORDING AND PLAYBACK DEVICE.
FR1187616A (en) Electrostatic recording and reproducing device
FR1018150A (en) System for controlling the operation of an amplifier
FR919990A (en) Improvement of the sound recording and reproduction control system
FR1084968A (en) Improvements to sound recording and reproduction systems
NL146666B (en) SIGNAL AMPLIFIER.
FR1010870A (en) Sound reproduction system usable in particular for giving the exact time and transmitting announcements or advertisements
FR920542A (en) Improvements to magnetic recording and reproduction devices
FR929570A (en) Sound recording and reproduction device
FR948451A (en) Sound recording and reproduction device
FR953333A (en) Sound recording and reproduction device
FR1043503A (en) Sound recording or reproducing device
FR978609A (en) Sound recording and reproducing device
FR989851A (en) Sound recording system on film
FR1000717A (en) Improvements to sound recording and reproduction machines
CH286169A (en) Magnetic sound recording device on disc.
FR986558A (en) Sound recording and reproduction device
FR939589A (en) Device for the use and reproduction of electro-optically reproducible sound recordings
FR943320A (en) Improvement in magnetic sound recording and reproduction devices
FR937524A (en) Impedance curve recorder
FR941721A (en) Framing and assembly system for construction set
ES183984A3 (en) SOUND RECORD AND REPRODUCTION SYSTEM.
FR996470A (en) Microphone for recording or magnetically reproducing sounds
FR927994A (en) Device for simultaneous control and recording of the on and off periods of several machies