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Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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Filing date
Publication date
Application filed by Le Materiel Telephonique Thomson CSFfiledCriticalLe Materiel Telephonique Thomson CSF
Application grantedgrantedCritical
Publication of FR689571ApublicationCriticalpatent/FR689571A/fr
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
G10K11/04—Acoustic filters ; Acoustic resonators
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Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Acoustics & Sound
(AREA)
Multimedia
(AREA)
FR689571D1930-02-071930-02-07Système pour la transmission d'ondes sonores
ExpiredFR689571A
(fr)