FR32957E - Loudspeaker acoustic unit intended for wireless telephony hearing - Google Patents

Loudspeaker acoustic unit intended for wireless telephony hearing

Info

Publication number
FR32957E
FR32957E FR32957DA FR32957E FR 32957 E FR32957 E FR 32957E FR 32957D A FR32957D A FR 32957DA FR 32957 E FR32957 E FR 32957E
Authority
FR
France
Prior art keywords
hearing
wireless telephony
acoustic unit
unit intended
loudspeaker acoustic
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
Georges-Julien-Celes Millet
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 filed Critical
Application granted granted Critical
Publication of FR32957E publication Critical patent/FR32957E/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
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/025—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators horns for impedance matching

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR32957D 1926-09-02 1926-09-02 Loudspeaker acoustic unit intended for wireless telephony hearing Expired FR32957E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR32957T 1926-09-02

Publications (1)

Publication Number Publication Date
FR32957E true FR32957E (en) 1928-06-06

Family

ID=8670626

Family Applications (1)

Application Number Title Priority Date Filing Date
FR32957D Expired FR32957E (en) 1926-09-02 1926-09-02 Loudspeaker acoustic unit intended for wireless telephony hearing

Country Status (1)

Country Link
FR (1) FR32957E (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2098419A1 (en) * 1970-07-15 1972-03-10 Palitex Project Co Gmbh

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2098419A1 (en) * 1970-07-15 1972-03-10 Palitex Project Co Gmbh

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