METHOD AND SYSTEM FOR PHASE DIFFERENCE MEASUREMENT FOR MICROPHONES
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United States of America Patent
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Issued Date -
Dec 10, 2009
app pub date -
Jun 5, 2008
filing date -
Jun 5, 2008
priority date (Note) -
Abandoned
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Abstract
The invention provides a system for phase difference measurement. In one embodiment, the system comprises a speaker, a high-speed digital input/output (HSDIO) device, and a testing computer. The speaker plays a test voice, wherein a reference microphone converts the test voice to a reference signal, and a plurality of test microphones convert the test voice to a plurality of tested signals. The HSDIO device receives the reference signal and the tested signals, and generates a multi-bit datastream according to the reference signal and the tested signals, wherein each word of the multi-bit datastream comprises a bit of the reference signal and a plurality of bits of the tested signals. The testing computer retrieves the reference signal and the tested signals from the multi-bit datastream, and measures phase differences between the tested signals and the reference signal.
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