Title (en)

Electrodynamic loudspeaker with a control device for an active vehicle noice attenuator

Title (de)

Elektrodynamischer Lautsprecher mit einer Regeleinrichtung für einen aktiven Kraftfahrzeug-Schalldämpfer

Title (fr)

Haut-parleur électrodynamique avec un dispositif de réglage pour un attenuateur de bruits d'un véhicule

Publication

EP 1059830 A3 20031217 (DE)

Application

EP 00110585 A 20000518

Priority

DE 19922897 A 19990519

Abstract (en)

[origin: EP1055804A1] The silencer has an exhaust tube (6) with a sound coupling point (5) in its wall, an introduction point for anti sound gener by a loudspeaker, and a resonance channel (4). The channel section (10) containing the coupling point, and a housing chamber nex the channel wall, are separated by a cooling gap (18,22) with cooling air flowing through it. The channel is formed by the inner chamber of a housing (7). The exhaust pipe passes through the housing, and the housing chamber forms the channel section (11) containing the introduction point.

IPC 1-7

H04R 3/00; F01N 1/06

IPC 8 full level

F01N 1/06 (2006.01); H04R 3/00 (2006.01)

CPC (source: EP)

F01N 1/065 (2013.01); H04R 3/002 (2013.01)

Citation (search report)

• [XY] GB 2083974 A 19820331 - RANK ORGANISATION THE LTD
• [Y] GB 2196815 A 19880505 - BIRT DAVID ROBIN
• [Y] US 3014096 A 19611219 - CLEMENTS WARNER W
• [A] US 4243839 A 19810106 - TAKAHASHI KENICHI, et al
• [Y] US 5541373 A 19960730 - CHENG C RAYMOND [US]

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 1055804 A1 20001129; EP 1055804 B1 20030312; DE 50001427 D1 20030417; EP 1059830 A2 20001213; EP 1059830 A3 20031217

DOCDB simple family (application)

EP 00110736 A 20000519; DE 50001427 T 20000519; EP 00110585 A 20000518