EP 0339746 A2 19891102 - Acoustic transducer backing in the shape of a Wood's horn.
Title (en)
Acoustic transducer backing in the shape of a Wood's horn.
Title (de)
Stützvorrichtung für einen akustischen Wandler in Form eines Woodschen Horns.
Title (fr)
Support en forme de corne de Wood pour un transducteur acoustique.
Publication
Application
Priority
US 18775488 A 19880429
Abstract (en)
The unwanted acoustic energy from the back side of an acoustic transducer (25) is fully absorbed in a Wood's Horn styled acoustic energy trap (30) embedded in an acoustically absorbing material (35). Also, the impedance of the transducer (25) and backing (30) can be exactly matched, thereby increasing the frequency bandwidth.
IPC 1-7
IPC 8 full level
G10K 11/00 (2006.01); G10K 11/02 (2006.01)
CPC (source: EP)
G10K 11/002 (2013.01); G10K 11/02 (2013.01)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0339746 A2 19891102; EP 0339746 A3 19910703; NO 891761 D0 19890427; NO 891761 L 19891030
DOCDB simple family (application)
EP 89201068 A 19890425; NO 891761 A 19890427