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FR433236A - Microphone - Google Patents

Microphone

Info

Publication number
FR433236A
FR433236A FR433236A FR433236DA FR433236A FR 433236 A FR433236 A FR 433236A FR 433236 A FR433236 A FR 433236A FR 433236D A FR433236D A FR 433236DA FR 433236 A FR433236 A FR 433236A
Authority
FR
France
Prior art keywords
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
FR433236A
Other languages
English (en)
Inventor
George Regester Webb
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR433236A publication Critical patent/FR433236A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/023—Microphones with more than one granular chamber

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
FR433236A 1911-07-24 1911-08-14 Microphone Expired FR433236A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191116955T 1911-07-24

Publications (1)

Publication Number Publication Date
FR433236A true FR433236A (fr) 1911-12-28

Family

ID=34357432

Family Applications (1)

Application Number Title Priority Date Filing Date
FR433236A Expired FR433236A (fr) 1911-07-24 1911-08-14 Microphone

Country Status (2)

Country Link
FR (1) FR433236A (fr)
GB (2) GB191116955A (fr)

Also Published As

Publication number Publication date
GB190916955A (fr)
GB191116955A (en) 1912-05-30

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