EP 1022928 A3 20021127 - Apparatus for and a method of improving the sound quality of loudspeakers
Title (en)
Apparatus for and a method of improving the sound quality of loudspeakers
Title (de)
Vorrichtung und Verfahren zur Tonqualitätsverbessurung von Lautsprechern
Title (fr)
Dispositif et procédé pour améliorer la qualité du son dans les haut-parleur
Publication
Application
Priority
GB 9901187 A 19990121
Abstract (en)
[origin: EP1022928A2] Apparatus for improving the sound quality of loudspeakers, comprises a rigid shell (10) having sound absorbing material (15) on its internal surface. The shell is adapted to fit over a loudspeaker enclosure (16) and the front of the shell is open or substantially open or is covered by material which permits sound to pass therethrough in an undistorted manner. <IMAGE>
IPC 1-7
IPC 8 full level
H04R 1/28 (2006.01)
CPC (source: EP)
H04R 1/288 (2013.01)
Citation (search report)
- [X] US 5194701 A 19930316 - YAMADA-SCRIBA TEPPI [JP]
- [X] EP 0111408 A1 19840620 - CELESTION INT LTD [GB]
- [X] DE 4000132 A1 19910711 - PRODAN HANS JOACHIM [DE]
- [X] US 4313521 A 19820202 - RODDEN M RAYMOND
- [A] GB 2176370 A 19861217 - ELEKTROAKUSZTIKAI GYAR
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 1022928 A2 20000726; EP 1022928 A3 20021127; GB 0000834 D0 20000308; GB 2346030 A 20000726; GB 9901187 D0 19990310
DOCDB simple family (application)
EP 00300282 A 20000117; GB 0000834 A 20000117; GB 9901187 A 19990121