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Journal of the Acoustical Society of America

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Nov 1980

Volume 68, Issue S1, pp. S1-S116

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back to top Session X. Architectural Acoustics III: New Discoveries of Wallace C. Sabine Papers. Time Delay Spectrometry and its Applications to Acoustical Measurement
Invited Papers
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TDS and beyond (A)

Carsten Thomsen

J. Acoust. Soc. Am. Volume 68, Issue S1, pp. S41-S41 (1980); (1 page)

Online Publication Date: 11 Aug 2005

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Time delay spectrometry can be implemented in a number of different ways, both analog and digital, or a combination of the two. This paper describes the different techniques and places special emphasis on the oft neglected time domain parameters that can be extracted by TDS. Of special interest are the so‐called energy time curve, the impulse response, time domain phase, and its derivative, instantaneous frequency. By invoking the Hilbert transform to derive these measurements, a complete symmetry between time and frequency domain representations is achieved. Based on these symmetry considerations, new, but easily implemented measurements are suggested for future studies.
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