Title:
BENDING WAVE PANEL SPEAKER AND METHOD OF DRIVING SUCH A SPEAKER
Document Type and Number:
WIPO Patent Application WO2001005189
Kind Code:
A3
Abstract:
A loudspeaker is made of a panel (1) supporting bending waves and a transducer (3) covering a substantial portion of the panel surface. At least one constraint, for example a clamp or a mass, is fixed to the panel. Each constraint reduces the mobility of a small area of the panel. Excitation of the transducer excites bending waves in the panel; the constraints discourage simple motion and encourage the production of a plurality of bending waves instead. The constraints can constrain the panel to be excited to produce a good distribution of resonant bending wave modes.
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Inventors:
BANK GRAHAM (GB)
Application Number:
PCT/GB2000/002422
Publication Date:
May 10, 2001
Filing Date:
July 06, 2000
Export Citation:
Assignee:
NEW TRANSDUCERS LTD (GB)
BANK GRAHAM (GB)
BANK GRAHAM (GB)
International Classes:
H04R7/04; H04R17/00; H04R31/00; (IPC1-7): H04R7/06; H04R17/00
Domestic Patent References:
| WO1997009842A2 | 1997-03-13 |
Foreign References:
| US5901231A | 1999-05-04 |
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