Method and device for measuring sound wave propagation time...

Details Method and device for measuring sound wave propagation time... Method and device for measuring sound wave propagation time...

2007-08-21

2007-08-21

Pendleton, Brian T. (Department: 2615)

Electrical audio signal processing systems and devices

Monitoring of sound

Reexamination Certificate

active

10537981

ABSTRACT:
A device1for measuring a propagation time of a sound wave comprises a sound source means11and a calculation means12. The sound source means11outputs a time stretched pulse as a sound source signal input to a speaker3. The calculation means12calculates a cross-correlation function of the time stretched pulse and the sound signal which is output from the speaker3and is received in a microphone4. Based on the cross-correlation function, the propagation time of the sound wave between the speaker3and the microphone4is found.

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International Application No. PCT/JP03/15702International Search Reportdated Feb. 27, 2004 by the Japanese Patent Office.

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