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1. EP0038043 - SIGNAL GENERATOR FOR OBTAINING AN ACOUSTIC SIGNAL

Office
European Patent Office
Application Number 81102766
Application Date 10.04.1981
Publication Number 0038043
Publication Date 21.10.1981
Publication Kind B1
IPC
G10K 9/12
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
KSOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
9Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
12electrically operated
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
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 SIEMENS AKTIENGESELLSCHAFT
Inventors KOSLAR, MANFRED, DIPL.-ING.
Designated States
Priority Data 3013788 10.04.1980 DE
Title
(DE) Signalgeber zur Erzeugung eines akustischen Signals.
(EN) SIGNAL GENERATOR FOR OBTAINING AN ACOUSTIC SIGNAL
(FR) Générateur de signaux pour l'obtention d'un signal acoustique.
Abstract
(DE)
Signalgeber dessen als elektromechanischer Wandler dienende Piezokeramikscheibe (1) rechteckförmig ausgestaltet ist, wobei Gegenbelegung (2) mit Ausnahme einer in ihrer Mitte vorgesehenen Freifläche (3) die grossflächige Gegenseite zur Hauptbelegung (9) bedeckt und in der Freifläche (3) die Rückkopplungsbelegung (4) vorgesehen ist.

(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).