EP 1041538 A1 20001004 - Mechanical filter for acoustic systems and television set equipped with such filters
Title (en)
Mechanical filter for acoustic systems and television set equipped with such filters
Title (de)
Mechanisches Filter für akustische Systeme sowie mit solche Filter ausgerüstete Fernsehern
Title (fr)
Filtre mécanique pour systèmes acoustiques et televiseur equipé de tels filtres
Publication
Application
Priority
FR 9903964 A 19990330
Abstract (en)
The invention relates to a mechanical filter for acoustic systems comprising at least one loudspeaker (6) and an acoustic horn (5) associated with the loudspeaker, the one open end (7) of the horn being secured to the edge (8) of the diaphragm (9) of the loudspeaker and the other open end (4) of the horn constituting the acoustic output. The horn exhibits rigid walls of which a part (10, 11) is rendered flexible, the flexible part of the horn being able to vibrate under the acoustic pressure inside the horn so as to filter or absorb the resonant peak(s) in the acoustic response of the rigid horn. The invention is particularly beneficial in improving the acoustic system for television sets. <IMAGE>
IPC 1-7
IPC 8 full level
G10K 11/04 (2006.01); H04N 5/64 (2006.01); H04R 1/02 (2006.01); H04R 1/28 (2006.01); H04R 1/30 (2006.01)
CPC (source: EP)
G10K 11/04 (2013.01); H04R 1/30 (2013.01); H04R 1/2819 (2013.01); H04R 1/2857 (2013.01); H04R 1/288 (2013.01); H04R 2499/15 (2013.01)
Citation (search report)
- [A] US 5524062 A 19960604 - OH KYOUNG-CHUL [KR]
- [A] US 5479520 A 19951226 - NIEUWENDIJK JORIS ADELBERT M [NL], et al
- [A] US 5710394 A 19980120 - SAITO HITOSHI [JP], et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 1998, no. 08 30 June 1998 (1998-06-30)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 1041538 A1 20001004; EP 1041538 B1 20061220; CN 1181673 C 20041222; CN 1270473 A 20001018; DE 60032407 D1 20070201; DE 60032407 T2 20071011; ES 2277814 T3 20070801; FR 2791802 A1 20001006; JP 2000308175 A 20001102
DOCDB simple family (application)
EP 00201058 A 20000322; CN 00104857 A 20000330; DE 60032407 T 20000322; ES 00201058 T 20000322; FR 9903964 A 19990330; JP 2000092101 A 20000329