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A Digital Approach to Time-Delay Spectrometry

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Time-delay spectrometry (TDS) is used to measure the frequency response of acoustical and electric systems. the design and the development of a completely digital implementation of a TDS system using an IBM-AT and the Ariel DSP-16 date acquisition board are explained. Employing a technique similar to that used for TDS measurements, the energy-time curve (ETC) of acoustical systems can be obtained. The theory and mathematical analysis of the TDS/ETC system are discussed with emphasis on the actual digital implementation. Examples demonstrate the operation of the system and, at the same time, disclose some of its subtle limitations.

JAES Volume 37 Issue 7/8 pp. 593-602; July 1989
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