EP 1425937 A2 20040609 - Method of improving the modal resonance frequency distribution of a panel
Title (en)
Method of improving the modal resonance frequency distribution of a panel
Title (de)
Verfahren zur Verbesserung des Modal Resonanzfrequenz Verteilung eines Panels
Title (fr)
Procédé pour améliorer la distribution des modes de fréquence de résonnance d'un panneau
Publication
Application
Priority
- GB 0203778 W 20020815
- GB 0120130 A 20010817
Abstract (en)
[origin: WO03026344A2] A method of improving the modal resonance frequency distribution of a panel (2) for a distribution resonant mode bending wave acoustic device involves analysing the distribution of the modal resonance frequencies of the panel, identifying a modal resonance frequency that is non-uniformly spaced relative to adjacent modal resonance frequencies, identifying a location on said panel that exhibits anti-nodal behaviour at said modal resonance frequency and changing the local impedance to bending wave vibration at said location (6). The method has particular application to distributed mode loudspeakers (1).
IPC 1-7
IPC 8 full level
H04R 7/26 (2006.01); H04R 29/00 (2006.01); H04R 1/00 (2006.01); H04R 7/04 (2006.01)
CPC (source: EP)
H04R 7/045 (2013.01); H04R 29/001 (2013.01)
Citation (search report)
See references of WO 03026344A2
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
WO 03026344 A2 20030327; WO 03026344 A3 20031030; AU 2002321477 A1 20030401; CN 100397952 C 20080625; CN 1526259 A 20040901; EP 1425937 A2 20040609; EP 1425937 B1 20120222; GB 0120130 D0 20011010; JP 2005503741 A 20050203; JP 4061267 B2 20080312; TW 577238 B 20040221
DOCDB simple family (application)
GB 0203778 W 20020815; AU 2002321477 A 20020815; CN 02813865 A 20020815; EP 02755181 A 20020815; GB 0120130 A 20010817; JP 2003529805 A 20020815; TW 91118536 A 20020816