FR703070A - Perfectionnements aux appareils acoustiques - Google Patents

Perfectionnements aux appareils acoustiques

Info

Publication number
FR703070A
FR703070A FR703070DA FR703070A FR 703070 A FR703070 A FR 703070A FR 703070D A FR703070D A FR 703070DA FR 703070 A FR703070 A FR 703070A
Authority
FR
France
Prior art keywords
hearing devices
hearing
devices
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.)
Compagnie des Freins Westinghouse
Original Assignee
Compagnie des Freins Westinghouse
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 Compagnie des Freins Westinghouse filed Critical Compagnie des Freins Westinghouse
Application granted granted Critical
Publication of FR703070A publication Critical patent/FR703070A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/02—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/02—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated
    • G10K9/04—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated by compressed gases, e.g. compressed air

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Combined Devices Of Dampers And Springs (AREA)
FR703070D 1929-10-19 1930-10-01 Perfectionnements aux appareils acoustiques Expired FR703070A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US351057XA 1929-10-19 1929-10-19

Publications (1)

Publication Number Publication Date
FR703070A true FR703070A (fr) 1931-04-23

Family

ID=21880671

Family Applications (1)

Application Number Title Priority Date Filing Date
FR703070D Expired FR703070A (fr) 1929-10-19 1930-10-01 Perfectionnements aux appareils acoustiques

Country Status (2)

Country Link
FR (1) FR703070A (fr)
GB (1) GB351057A (fr)

Also Published As

Publication number Publication date
GB351057A (en) 1931-06-22

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