Accession Number : ADA020043

Title :   Application of an Automatic Level Regulator to Taped Contacts in Sonar Detection Research.

Descriptive Note : Memorandum rept.,

Corporate Author : NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CONN

Personal Author(s) : Cole,Barry F.

Report Date : 20 FEB 1975

Pagination or Media Count : 12

Abstract : In an effort to obtain more accurate sonar detection threshold level measurements, a selection of transient noise-free sections of sonar contact recordings was made. These sections were then removed from the master recording and formed into endless loops. These recorded loops were then reproduced through an automatic level regulator and re-recorded onto a tape reel. Noise transients were eliminated and signal-to-noise fluctuations were reduced. (Author)

Descriptors :   *Passive sonar, *Target detection, *Sonar targets, *Auditory perception, Automatic, Noise(Sound), Transients, Signal to noise ratio, Regulators, Thresholds(Physiology)

Subject Categories : Anatomy and Physiology
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE