Acoustic device
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United States of America Patent
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Issued Date -
Feb 20, 2003
app pub date -
Aug 16, 2002
filing date -
Aug 17, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of improving the modal resonance frequency distribution of a panel for a distributed resonant mode bending wave acoustic device. The method 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 the panel that exhibits anti-nodal behaviour at the identified modal resonance frequency, and changing the local impedance to bending wave vibration at that location. The method has particular application to distributed mode loudspeakers.
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