Accession Number : AD0900341

Title :   Multichannel Sonar Recorder Design Problems and Alternatives.

Descriptive Note : Technical note Jul-Sep 70 on Phase 1,

Corporate Author : NAVAL TRAINING DEVICE CENTER ORLANDO FL

Personal Author(s) : McKechnie, John C.

Report Date : 28 SEP 1970

Pagination or Media Count : 44

Abstract : This study discusses the general arrangement of a recorder/reproducer in a sonar system for training purposes. The present day major recorder/reproducer problem is discussed. The characteristic of generalized underwater spectral signatures, the rates of sound attenuation underwater, and human ear response are related. Recording concepts, film and tape recording mediums, and recording methods are considered. A comparison is made between magnetic vs electro-optical recording and multiplexed wideband single track recording vs low frequency parallel track recording. A possible 450 track, 10 kHz bandpass parallel track electro-optical recorder/reproducer is proposed using optical fibers, light emitting diodes, PIN photo diodes and photographic recording film. (Author)

Descriptors :   (*SONAR EQUIPMENT, NAVAL TRAINING), (*RECORDING SYSTEMS, SONAR SIGNALS), UNDERWATER SOUND, ATTENUATION, SONAR PERSONNEL, ELECTROOPTICS, MAGNETIC TAPE, MULTIPLEXING, BROADBAND, FIBER OPTICS, PHOTODIODES, MODULATORS, SONAR SOUND ANALYZERS, CLASSIFICATION, PHOTOGRAPHIC RECORDING SYSTEMS, TRANSDUCERS, VIDEO AMPLIFIERS, EAR, RESPONSE, LASERS.

Subject Categories : Recording and Playback Devices
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE