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Measurement of time delay using the time shift property of the discrete Fourier transform (DFT)

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1 Author(s)
Nagai, K. ; University of Tsukuba, Ibaraki, Japan

The time shift property of the discrete Fourier transform (DFT) is used in the measurement of time delay. The eccentricity of a screw rod has been experimentally measured, and delays of the ultrasonic wave have been known with the precision of one percent of the temporal sampling interval.

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Acoustics, Speech and Signal Processing, IEEE Transactions on  (Volume:34 ,  Issue: 4 )