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1. WO1981002963 - DEVICE FOR GENERATING UN ACOUSTIC SIGNAL

Publication Number WO/1981/002963
Publication Date 15.10.1981
International Application No. PCT/DE1981/000056
International Filing Date 10.04.1981
IPC
H04R 17/10 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
17Piezo-electric transducers; Electrostrictive transducers
10Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
CPC
H04R 17/10
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
17Piezo-electric transducers; Electrostrictive transducers
10Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
Applicants
Inventors
Priority Data
301378810.04.1980DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(EN) DEVICE FOR GENERATING UN ACOUSTIC SIGNAL
(FR) DISPOSITIF POUR PRODUIRE UN SIGNAL ACOUSTIQUE
Abstract
(EN)
Device for generating acoustic signals using as an electromechanical transducer element a piezoelectric quadrangular ceramic plate (1) which is covered on the face opposite to the main layer (9) with a layer having on its center an opening (3) provided for the reactive coupling layer (4).
(FR)
Il est propose un dispositif pour la production de signaux acoustiques qui utilise comme element tranducteur electromecanique une plaque de ceramique quadrangulaire piezo-electrique (1) qui est recouverte sur la face opposee a la couche principale (9) par une couche presentant en son centre une ouverture (3) prevue pour la couche de couplage reactif (4).
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