EP 2023651 B1 20111109 - Loudspeaker
Title (en)
Loudspeaker
Title (de)
Lautsprecher
Title (fr)
Haut-parleur
Publication
Application
Priority
- DE 102007034552 A 20070721
- DE 102007036765 A 20070803
- DE 102008016570 A 20080401
- DE 102008021500 A 20080429
Abstract (en)
[origin: EP2023651A1] The method involves connecting a forward sound center (1) and a rearward sound center (2) at an exciting voltage by a phase shifter circuit (15). A rearward phase difference is shifted along a main beam direction of a loudspeaker by the circuit, where the rearward phase difference is associated with center (2). The phase difference of the center (2) and a forward phase difference in a bass are reduced, where the circuit strongly damps exciting voltage with high frequencies. A limiting frequency of the phase shifter circuit is selected, which is smaller than a larger value of specific quantity. An independent claim is also included for a loudspeaker comprising a forward sound center and a rearward sound center.
IPC 8 full level
CPC (source: EP)
H04R 1/227 (2013.01); H04R 3/12 (2013.01); H04R 2430/20 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 08012698 A 20080714