EP 1039445 A3 20020109 - Apparatus for generating soundwaves with predetermined sound-lobe
Title (en)
Apparatus for generating soundwaves with predetermined sound-lobe
Title (de)
Einrichtung zur Erzeugung von Schallwellen mit vorgegebener Schallkeule
Title (fr)
Dispositif pour générer des ondes acoustiques à lobe acoustique prédéterminée
Publication
Application
Priority
DE 19913871 A 19990326
Abstract (en)
[origin: EP1039445A2] An ultrasonic transducer (W) is used to produce sound waves with a rotationally symmetrical beam lobe. At least one scattering body (4) is positioned in the direction of sound propagation within the Fresnel zone of the ultrasonic transducer. The scattering body may be elongate in shape and positioned at right angles to the direction of sound propagation. Various other shapes are also claimed.
IPC 1-7
IPC 8 full level
G10K 11/26 (2006.01)
CPC (source: EP)
G10K 11/26 (2013.01)
Citation (search report)
- [X] US 5185728 A 19930209 - GILCHRIST IAN R [US]
- [X] PATENT ABSTRACTS OF JAPAN vol. 010, no. 358 (P - 522) 2 December 1986 (1986-12-02)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1039445 A2 20000927; EP 1039445 A3 20020109; DE 19913871 A1 20000928
DOCDB simple family (application)
EP 00105222 A 20000313; DE 19913871 A 19990326