Speaker device and filter coefficient generating device therefor
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United States of America Patent
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Aug 25, 2015
Grant Date -
Feb 14, 2013
app pub date -
Apr 26, 2010
filing date -
Apr 26, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
To provide a speaker device that can form a substantially uniform sound field over a range from a long distance to a short distance without significantly increasing a calculation load. A plurality of FIR filters 21 to 2n perform delay control of respective speakers so as to increase a delay time difference between adjacent speakers 51 to 5n in a line array speaker 5 toward one end of the line array speaker 5, and thereby over a wide range from a long distance to a short distance, a sound filed 12 is formed. Also, by adding a common shift delay time Dc to filter coefficients for the FIR filters 21 to 2n, the delay time difference between adjacent speakers 51 to 5n is made less than a sampling period of a sound signal to form a wide and uniform sound field 12.
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