Accession Number : ADA264625
Title : The Effects of Digital Sampling Rate and Bit Quantization on Passive Auditory Sonar Target Detection Performance
Descriptive Note : Interim rept.
Corporate Author : NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
Personal Author(s) : Russotti, J S ; Santoro, T P ; Hanna, T E ; Wojtowicz, J J
Report Date : 04 Feb 1993
Pagination or Media Count : 17
Abstract : Modern signal-processing techniques have been applied in passive sonar to enhance sonar-operator performance for visually presented information. However, those same techniques degrade the auditory signal. These facts are surprising because, in many situations, such as the classification of transients and broadband signals with few tonal components, the sonar operator must rely heavily on auditory information. Therefore, it is important to ensure that the audio component of new sonar systems is not degraded by the use of inadequate digital techniques. This report describes our procedure for evaluation of digital sample rate and quantization and shows the significant degradation in detection performance as a function of both reduced sample rate and reduction in number of bits used to code signal amplitude.
Descriptors : *SONAR SOUND ANALYZERS , *AUDITORY PERCEPTION , SIGNAL PROCESSING , FUNCTIONS , TRANSIENTS , DIGITAL SYSTEMS , DETECTION , DEGRADATION , RATES , REDUCTION , BROADBAND , QUANTIZATION , AMPLITUDE , TARGET CLASSIFICATION , AUDITORY SIGNALS , PASSIVE SONAR
Subject Categories : Acoustic Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE