EP 1408717 A3 20040804 - Combination loudspeaker unit
Title (en)
Combination loudspeaker unit
Title (de)
Kombinierte Lautsprechereinheit
Title (fr)
Unité combiné de haut parleurs
Publication
Application
Priority
- GB 0219245 A 20020817
- GB 0317445 A 20030725
Abstract (en)
[origin: EP1408717A2] A loudspeaker unit comprises, in combination, a pistonically driven diaphragm loudspeaker and a generally planar resonant panel loudspeaker, in which the plane of the resonant panel lies in the same orientation as an axis along which the diaphragm is pistonically driven. The resonant panel loudspeaker may be located behind the diaphragm loudspeaker, with the resonant panel loudspeaker functioning as a diffuse dipole, e.g. to generate surround sound reproduction, and the diaphragm loudspeaker located in the null of the dipole and functioning as an acoustic monopole, e.g. to generate imaged stereophonic sound reproduction. <IMAGE>
IPC 1-7
IPC 8 full level
H04R 1/24 (2006.01); H04R 7/04 (2006.01); H04R 1/26 (2006.01)
CPC (source: EP GB)
H04R 1/24 (2013.01 - EP GB); H04R 7/045 (2013.01 - EP); H04R 1/26 (2013.01 - EP); H04R 1/323 (2013.01 - GB); H04R 7/045 (2013.01 - GB); H04R 2205/022 (2013.01 - EP); H04R 2440/07 (2013.01 - EP)
Citation (search report)
- [XY] DE 19955867 A1 20010621 - HARMAN AUDIO ELECTRONIC SYS [DE]
- [X] US 3291251 A 19661213 - ZEMROWSKI EDMUND A
- [Y] DE 3904943 A1 19900920 - PFLEIDERER PETER [DE]
- [A] US 6332029 B1 20011218 - AZIMA HENRY FIROUZ [GB], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1408717 A2 20040414; EP 1408717 A3 20040804; EP 1408717 B1 20060301; AT E319279 T1 20060315; DE 60303748 D1 20060427; DE 60303748 T2 20061109; DK 1408717 T3 20060710; ES 2260580 T3 20061101; GB 0319297 D0 20030917; GB 2392043 A 20040218; GB 2392043 B 20060322; PT 1408717 E 20060731
DOCDB simple family (application)
EP 03255099 A 20030818; AT 03255099 T 20030818; DE 60303748 T 20030818; DK 03255099 T 20030818; ES 03255099 T 20030818; GB 0319297 A 20030818; PT 03255099 T 20030818