Accession Number : AD0664958

Title :   AN IMPROVED TWO-ELEMENT ALMOST OMNIDIRECTIONAL RECEIVER.

Descriptive Note : Technical rept.,

Corporate Author : BELL TELEPHONE LABS INC WHIPPANY N J

Personal Author(s) : Shapiro,Arthur

Report Date : 14 OCT 1966

Pagination or Media Count : 23

Abstract : The sum of spectra has been suggested as a method for providing improved signal detectability from a plurality of sensors while retaining omnidirectionality. This report describes an alternative procedure for the two-element case that, while not quite omnidirectional, offers a decided advantage in detection performance over the power sum scheme. It involves taking the logical union of the spectrum of the sum of the hydrophone outputs and the spectrum of the difference of the hydrophone outputs. A comparison of the two systems is presented and it is shown that the latter scheme is almost always better than the former. (Author)

Descriptors :   (*OMNIDIRECTIONAL ANTENNAS, MODIFICATION KITS), (*ACOUSTIC DETECTORS, PERFORMANCE(ENGINEERING)), HYDROPHONES, SIGNALS, PROCESSING, PHASE, SPECTRUM ANALYZERS, THEORY

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE