EP 1169884 B1 20030625 - FLAT SURFACE LOUDSPEAKER AND METHOD FOR OPERATING THE SAME
Title (en)
FLAT SURFACE LOUDSPEAKER AND METHOD FOR OPERATING THE SAME
Title (de)
FLÄCHENLAUTSPRECHER UND VERFAHREN ZU DESSEN BETRIEB
Title (fr)
HAUT-PARLEUR PLAN ET SON PROCEDE DE PRODUCTION
Publication
Application
Priority
- DE 9903377 W 19991021
- DE 19917584 A 19990419
Abstract (en)
[origin: WO0064217A1] The invention relates to a method for operating a flat surface loudspeaker (1). According to the method, at least one moving coil (3, 4) is applied to a platform-shaped surface (2) with predetermined material properties. Said surface is excited to vibration by the at least one moving coil, which is electrically excited by a source of sound (7). The acoustic frequency response of the flat surface loudspeaker is measured and the inverse frequency curve to its frequency curve is determined. This inverse frequency curve is simulated in a filtering device (8) as its transfer function. The filtering device is connected between the sound source (7) and the flat surface loudspeaker (1) in the operating arrangement, so that the frequency response of the flat surface speaker is compensated based on its transfer function. The compensation of the frequency response of the flat surface loudspeaker improves its transfer properties even to hi-fi standards.
IPC 1-7
IPC 8 full level
H04R 1/22 (2006.01); H04R 3/04 (2006.01); H04R 7/04 (2006.01); H04R 29/00 (2006.01)
CPC (source: EP)
H04R 3/04 (2013.01); H04R 7/04 (2013.01); H04R 29/001 (2013.01); H04R 7/045 (2013.01)
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)
WO 0064217 A1 20001026; AT E243910 T1 20030715; AU 1768700 A 20001102; AU 767985 B2 20031127; DE 19917584 A1 20001026; DE 59906131 D1 20030731; DK 1169884 T3 20031020; EP 1169884 A1 20020109; EP 1169884 B1 20030625; JP 2002542745 A 20021210
DOCDB simple family (application)
DE 9903377 W 19991021; AT 99960797 T 19991021; AU 1768700 A 19991021; DE 19917584 A 19990419; DE 59906131 T 19991021; DK 99960797 T 19991021; EP 99960797 A 19991021; JP 2000613226 A 19991021