发明名称 |
Method and device for measuring sound wave propagation time between loudspeaker and microphone |
摘要 |
A device 1 for measuring a propagation time of a sound wave comprises a sound source means 11 and a calculation means 12 . The sound source means 11 outputs a time stretched pulse as a sound source signal input to a speaker 3 . The calculation means 12 calculates a cross-correlation function of the time stretched pulse and the sound signal which is output from the speaker 3 and is received in a microphone 4 . Based on the cross-correlation function, the propagation time of the sound wave between the speaker 3 and the microphone 4 is found.
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申请公布号 |
US7260227(B2) |
申请公布日期 |
2007.08.21 |
申请号 |
US20050537981 |
申请日期 |
2005.11.18 |
申请人 |
TOA CORPORATION |
发明人 |
HIGASHIHARA DAISUKE;HINO SHOKICHIRO;TSUCHIYA KOICHI;ENDO TOMOHIKO |
分类号 |
H04R29/00;G01S11/14;H04R3/00;H04S7/00 |
主分类号 |
H04R29/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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