FR658425A - Microphone perfectionné - Google Patents

Microphone perfectionné

Info

Publication number
FR658425A
FR658425A FR658425DA FR658425A FR 658425 A FR658425 A FR 658425A FR 658425D A FR658425D A FR 658425DA FR 658425 A FR658425 A FR 658425A
Authority
FR
France
Prior art keywords
microphone
advanced
advanced 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.)
COLUMBIA GRAPHOPHONE Co
Original Assignee
COLUMBIA GRAPHOPHONE Co
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 COLUMBIA GRAPHOPHONE Co filed Critical COLUMBIA GRAPHOPHONE Co
Application granted granted Critical
Publication of FR658425A publication Critical patent/FR658425A/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
    • H04R21/026—Microphones in which the sound is perpendicular to the current crossing the transducer material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR658425D 1927-09-09 1928-07-30 Microphone perfectionné Expired FR658425A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1865210X 1927-09-09

Publications (1)

Publication Number Publication Date
FR658425A true FR658425A (fr) 1929-06-04

Family

ID=10892353

Family Applications (1)

Application Number Title Priority Date Filing Date
FR658425D Expired FR658425A (fr) 1927-09-09 1928-07-30 Microphone perfectionné

Country Status (2)

Country Link
US (1) US1865210A (fr)
FR (1) FR658425A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007013A (en) * 1959-04-22 1961-10-31 Astatic Corp Microphone construction

Also Published As

Publication number Publication date
US1865210A (en) 1932-06-28

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