GB470148A - Improvements in or relating to sound signals transmission systems - Google Patents

Improvements in or relating to sound signals transmission systems

Info

Publication number
GB470148A
GB470148A GB30044/36A GB3004436A GB470148A GB 470148 A GB470148 A GB 470148A GB 30044/36 A GB30044/36 A GB 30044/36A GB 3004436 A GB3004436 A GB 3004436A GB 470148 A GB470148 A GB 470148A
Authority
GB
United Kingdom
Prior art keywords
relating
sound signals
transmission systems
signals transmission
microphone
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
GB30044/36A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB470148A publication Critical patent/GB470148A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)
  • Selective Calling Equipment (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

470,148. Automatic volume control. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Nov. 4. 1936, No. 30044. Convention date, Nov. 4, 1935. [Class 40 (iv)] In a public-address &c. system in which automatic volume control is effected by an auxiliary microphone 2 acting through a rectifier 3 on a main amplifier 4, the auxiliary microphone is permanently fixed at approximately the same distance from the source as the main microphone 1. The auxiliary microphone may be arranged to favour low frequencies.
GB30044/36A 1935-11-04 1936-11-04 Improvements in or relating to sound signals transmission systems Expired GB470148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE470148X 1935-11-04

Publications (1)

Publication Number Publication Date
GB470148A true GB470148A (en) 1937-08-10

Family

ID=6541090

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30044/36A Expired GB470148A (en) 1935-11-04 1936-11-04 Improvements in or relating to sound signals transmission systems

Country Status (1)

Country Link
GB (1) GB470148A (en)

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