FR479578A - Universal means for the transmission of sound - Google Patents

Universal means for the transmission of sound

Info

Publication number
FR479578A
FR479578A FR479578DA FR479578A FR 479578 A FR479578 A FR 479578A FR 479578D A FR479578D A FR 479578DA FR 479578 A FR479578 A FR 479578A
Authority
FR
France
Prior art keywords
sound
transmission
universal means
universal
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
French (fr)
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.)
UNIVERSAL HIGH POWER TELEPHONE
Original Assignee
UNIVERSAL HIGH POWER TELEPHONE
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 UNIVERSAL HIGH POWER TELEPHONE filed Critical UNIVERSAL HIGH POWER TELEPHONE
Application granted granted Critical
Publication of FR479578A publication Critical patent/FR479578A/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
    • 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)
FR479578D 1915-08-23 1915-08-23 Universal means for the transmission of sound Expired FR479578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR479578T 1915-08-23

Publications (1)

Publication Number Publication Date
FR479578A true FR479578A (en) 1916-04-12

Family

ID=1516937

Family Applications (1)

Application Number Title Priority Date Filing Date
FR479578D Expired FR479578A (en) 1915-08-23 1915-08-23 Universal means for the transmission of sound

Country Status (1)

Country Link
FR (1) FR479578A (en)

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