FR77008E - Perfectionnements aux microphones - Google Patents

Perfectionnements aux microphones

Info

Publication number
FR77008E
FR77008E FR810135A FR810135A FR77008E FR 77008 E FR77008 E FR 77008E FR 810135 A FR810135 A FR 810135A FR 810135 A FR810135 A FR 810135A FR 77008 E FR77008 E FR 77008E
Authority
FR
France
Prior art keywords
refinements
microphone
microphone refinements
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
FR810135A
Other languages
English (en)
Inventor
Albert Armand Marie Medar Wyns
Frans Maria Corneel Verachtert
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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
Priority claimed from GB34296/56A external-priority patent/GB803284A/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to FR810135A priority Critical patent/FR77008E/fr
Application granted granted Critical
Publication of FR77008E publication Critical patent/FR77008E/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR810135A 1956-11-09 1959-11-12 Perfectionnements aux microphones Expired FR77008E (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR810135A FR77008E (fr) 1956-11-09 1959-11-12 Perfectionnements aux microphones

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB34296/56A GB803284A (en) 1956-11-09 1956-11-09 Improvements in or relating to telephone transmitters
FR810135A FR77008E (fr) 1956-11-09 1959-11-12 Perfectionnements aux microphones

Publications (1)

Publication Number Publication Date
FR77008E true FR77008E (fr) 1962-01-08

Family

ID=26184607

Family Applications (1)

Application Number Title Priority Date Filing Date
FR810135A Expired FR77008E (fr) 1956-11-09 1959-11-12 Perfectionnements aux microphones

Country Status (1)

Country Link
FR (1) FR77008E (fr)

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