FR731715A - Perfectionnements aux amplificateurs microphoniques - Google Patents

Perfectionnements aux amplificateurs microphoniques

Info

Publication number
FR731715A
FR731715A FR731715DA FR731715A FR 731715 A FR731715 A FR 731715A FR 731715D A FR731715D A FR 731715DA FR 731715 A FR731715 A FR 731715A
Authority
FR
France
Prior art keywords
microphone amplifiers
amplifiers
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
Other languages
English (en)
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Application granted granted Critical
Publication of FR731715A publication Critical patent/FR731715A/fr
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
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/02—Transducers using more than one principle simultaneously

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR731715D 1931-02-27 1932-02-22 Perfectionnements aux amplificateurs microphoniques Expired FR731715A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US396707XA 1931-02-27 1931-02-27

Publications (1)

Publication Number Publication Date
FR731715A true FR731715A (fr) 1932-09-06

Family

ID=21906740

Family Applications (1)

Application Number Title Priority Date Filing Date
FR731715D Expired FR731715A (fr) 1931-02-27 1932-02-22 Perfectionnements aux amplificateurs microphoniques

Country Status (2)

Country Link
FR (1) FR731715A (fr)
GB (1) GB396707A (fr)

Also Published As

Publication number Publication date
GB396707A (en) 1933-08-08

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