The development of a unique system for the automatic detection and identification of noisy vehicles is described. The instrument produces a continuous chart record of the A-weighted sound level at the monitoring location. Vehicles whose sound level exceeds a pre-set limit are automatically photographed by a split image camera which simultaneously records the relevant portion of the chart record. The optimum moment for photography of the vehicle is determined by a novel array utilizing cross correlation techniques.

Authors: Allen, Richard G.; Owen, Thomas P.; Torick, Emil L.
Affiliation: CBS Laboratories, Stamford, CT
AES Convention: 39 (October 1970) Paper Number: 754
Publication Date: October 1, 1970 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=1258

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