EP 1372354 A2 20031217 - Low frequency loudspeaker
Title (en)
Low frequency loudspeaker
Title (de)
Niedrigfrequenz-Lautsprecher
Title (fr)
Haut-parleur à basse fréquence
Publication
Application
Priority
GB 0213766 A 20020614
Abstract (en)
A low frequency loudspeaker for reproducing the lowest frequency range in a multi-band sound reinforcement system comprises an enclosure (8 to 13) with a front port (14). Drive units (1, 2) are mounted on baffles (3, 4) which divide the enclosure (8-13) into sealed chambers (5, 7) behind the drive units (1, 2) and a chamber (6) which vents through the port (14) but is otherwise sealed. The drive units (1, 2) point generally away from the port (14). The chamber (6) extends smoothly backwards from the port (14) and the cross-sectional area of the chamber (6) perpendicular to the direction (17) of sound emission from the port (14) increases continuously with distance from the port (14). <IMAGE>
IPC 1-7
IPC 8 full level
H04R 1/22 (2006.01); H04R 1/34 (2006.01); H04R 9/06 (2006.01)
CPC (source: EP)
H04R 1/345 (2013.01)
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 1372354 A2 20031217; EP 1372354 A3 20051123; EP 1372354 B1 20110727; DK 1372354 T3 20111031; ES 2368424 T3 20111117; GB 0213766 D0 20020724; PT 1372354 E 20110926
DOCDB simple family (application)
EP 03101720 A 20030612; DK 03101720 T 20030612; ES 03101720 T 20030612; GB 0213766 A 20020614; PT 03101720 T 20030612