FR835520A - Acoustic wave transmission device - Google Patents

Acoustic wave transmission device

Info

Publication number
FR835520A
FR835520A FR835520DA FR835520A FR 835520 A FR835520 A FR 835520A FR 835520D A FR835520D A FR 835520DA FR 835520 A FR835520 A FR 835520A
Authority
FR
France
Prior art keywords
transmission device
acoustic wave
wave transmission
acoustic
wave
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR835520A publication Critical patent/FR835520A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
FR835520D 1937-09-09 1937-09-09 Acoustic wave transmission device Expired FR835520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR835520T 1937-09-09

Publications (1)

Publication Number Publication Date
FR835520A true FR835520A (en) 1938-12-23

Family

ID=9297679

Family Applications (1)

Application Number Title Priority Date Filing Date
FR835520D Expired FR835520A (en) 1937-09-09 1937-09-09 Acoustic wave transmission device

Country Status (2)

Country Link
FR (1) FR835520A (en)
GB (1) GB518851A (en)

Also Published As

Publication number Publication date
GB518851A (en) 1940-03-08

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