Acoustic device
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United States of America Patent
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Feb 17, 2004
Issued Date -
N/A
app pub date -
Aug 31, 1999
filing date -
Sep 3, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A panel form acoustic member capable of supporting bending wave vibration has the bending wave velocity varied in the region of coincidence to provide a range of coincidence frequencies, for causing the acoustic coupling of the bending waves in the panel to occur over a broader range of angles or for making the coupling more uniform. The member may be incorporated in a loudspeaker having a panel member (1) and an exciter (3) fixed to the panel member to excite bending waves in the loudspeaker to cause an acoustic output.
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