EP 0220354 B1 19910710 - LOUDSPEAKER COMBINATION WITH PIEZO-ELECTRIC TWEETER
Title (en)
LOUDSPEAKER COMBINATION WITH PIEZO-ELECTRIC TWEETER
Publication
Application
Priority
IT 6258585 A 19850902
Abstract (en)
[origin: EP0220354A2] This invention concerns a multiple loudspeaker with a piezo-electric "tweeter", held up by a means of support which allows the rear wave emitted by the ceramic disk and respective conical diaphragm to be fully exploited, using the main loudspeaker cone as a reflecting surface without overloading the moving coil of the latter. The invention is basically characterized by the fact that the piezoelectric "tweeter" is placed in front of the main loudspeaker cone, without the traditional protection and support basket, but using a different means of support which does not intercept or disturb the rear radiation from the piezoelectric "tweeter", or prevent the forward reflection of the radiation by the main loudspeaker diaphragm.
IPC 1-7
IPC 8 full level
H04R 1/24 (2006.01); H04R 23/02 (2006.01)
CPC (source: EP KR)
Designated contracting state (EPC)
AT BE CH DE FR GB LI LU NL SE
DOCDB simple family (publication)
EP 0220354 A2 19870506; EP 0220354 A3 19880107; EP 0220354 B1 19910710; AT E65149 T1 19910715; CA 1287394 C 19910806; DE 3583442 D1 19910814; DK 171190 B1 19960715; DK 251586 A 19870303; DK 251586 D0 19860529; ES 555745 A0 19870901; ES 8707839 A1 19870901; FI 862323 A0 19860530; FI 862323 A 19870303; FI 86941 B 19920715; FI 86941 C 19921026; IT 1187062 B 19871216; IT 8500625 A0 19850902; JP H0738752 B2 19950426; JP S6253590 A 19870309; KR 870003670 A 19870418; KR 950002765 B1 19950324; NO 169930 B 19920511; NO 169930 C 19920819; NO 862429 D0 19860618; NO 862429 L 19870303
DOCDB simple family (application)
EP 85830227 A 19850909; AT 85830227 T 19850909; CA 513575 A 19860711; DE 3583442 T 19850909; DK 251586 A 19860529; ES 555745 A 19860605; FI 862323 A 19860530; IT 6258585 A 19850902; JP 15890886 A 19860708; KR 860004662 A 19860612; NO 862429 A 19860618