FREQUENCY-RESPONSE CHARACTERISTICS OF AN IMPROVED TRANSISTORIZED MILITARIZED INTERCOM SYSTEM PROPOSED BY THE USN UNDERWATER SOUND LABORATORY FOR USE IN MAINTENANCE AND TESTING OF THE AN/BQS-6 SONAR SYSTEM
Abstract
An investigation was made to determine whether the speech- transmission characteristics of an improved transistorized version of the Raytheon Co.'s LS-503/BQS6B intercommunication system would equal the performance characteristics of the non-militarized system found satisfactory in USN Submarine Medical Center Special Report No. 65-2. At the most favorable settings for speech communications in the Master Slave station mode, frequency passband was 490-4000, harmonic distortion, at 1000 cycles/ sec was 14 per cent, the roll-off below the maximum at 1500 cycles/sec was 20 db per octave, and the maximum signal to noise ratio, at 1500 cycles/sec, was 40 db. In the Slave- Master mode, performance was equally good except that harmonic distortion was excessively high at 40 per cent. The low frequency slope, which reduces the masking effect of intense low frequency ambient sounds as well as system resonance at 200 cycles/sec, renders this improved militarized variation satisfactory for sonar maintenance and component testing of subject system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 24, 1965
- Accession Number
- AD0624755
Entities
People
- J. D. Harris