FR427939A - Dual acoustics for aviators - Google Patents

Dual acoustics for aviators

Info

Publication number
FR427939A
FR427939A FR427939DA FR427939A FR 427939 A FR427939 A FR 427939A FR 427939D A FR427939D A FR 427939DA FR 427939 A FR427939 A FR 427939A
Authority
FR
France
Prior art keywords
aviators
acoustics
dual
dual acoustics
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)
Inventor
Henri-Arsene Boivin
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.)
HENRI ARSENE BOIVIN
Original Assignee
HENRI ARSENE BOIVIN
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 HENRI ARSENE BOIVIN filed Critical HENRI ARSENE BOIVIN
Application granted granted Critical
Publication of FR427939A publication Critical patent/FR427939A/en
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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/22—Methods or devices for transmitting, conducting or directing sound for conducting sound through hollow pipes, e.g. speaking tubes
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/30—Mounting radio sets or communication systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR427939D 1911-03-29 1911-03-29 Dual acoustics for aviators Expired FR427939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR427939T 1911-03-29

Publications (1)

Publication Number Publication Date
FR427939A true FR427939A (en) 1911-08-17

Family

ID=1470371

Family Applications (1)

Application Number Title Priority Date Filing Date
FR427939D Expired FR427939A (en) 1911-03-29 1911-03-29 Dual acoustics for aviators

Country Status (1)

Country Link
FR (1) FR427939A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090042A (en) * 1975-03-24 1978-05-16 Kayce, Inc. Acoustical communications headset
US4473130A (en) * 1981-10-12 1984-09-25 Hauni-Werke Korber & Co. Kg. Crash helmet with communication system
US4505358A (en) * 1982-01-11 1985-03-19 Ulrich Sielaff Voice communicator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090042A (en) * 1975-03-24 1978-05-16 Kayce, Inc. Acoustical communications headset
US4473130A (en) * 1981-10-12 1984-09-25 Hauni-Werke Korber & Co. Kg. Crash helmet with communication system
US4505358A (en) * 1982-01-11 1985-03-19 Ulrich Sielaff Voice communicator

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