EP 1440603 A2 20040728 - BASS FREQUENCY AMPLIFYING APPARATUS
Title (en)
BASS FREQUENCY AMPLIFYING APPARATUS
Title (de)
GERÄT ZUR VERSTÄRKUNG VON BASS FREQUENZEN
Title (fr)
APPAREIL D'AMPLIFICATION DES FREQUENCES DES GRAVES
Publication
Application
Priority
- EP 02765287 A 20021014
- EP 01203972 A 20011017
- IB 0204230 W 20021014
Abstract (en)
[origin: WO03034781A2] The invention concerns an apparatus for amplifying frequencies of bass sounds of an audio signal. The bass components are sent to an adjustable amplifier. The comparator circuit compares the amplifier input and output signals. When the feed forward signal level is higher than the feedback signal level, the bass performance is reduced, otherwise it is increased. The oscillation peak values are reduced in time and frequency for flat loudspeakers.
IPC 1-7
IPC 8 full level
H04R 1/22 (2006.01); G10L 13/00 (2006.01); H04R 3/00 (2006.01); H04R 3/04 (2006.01); H04S 1/00 (2006.01)
CPC (source: EP KR US)
Citation (search report)
See references of WO 03034781A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03034781 A2 20030424; WO 03034781 A3 20040422; AU 2002329002 A1 20030428; CN 1582602 A 20050216; EP 1440603 A2 20040728; JP 2005506781 A 20050303; KR 20040052236 A 20040622; US 2004258246 A1 20041223
DOCDB simple family (application)
IB 0204230 W 20021014; AU 2002329002 A 20021014; CN 02820521 A 20021014; EP 02765287 A 20021014; JP 2003537364 A 20021014; KR 20047005606 A 20021014; US 49258304 A 20040414