Near Field Sound Pressure Measurements of a Vibrated Sonar Transducer TR-208 - AN/SQS-23.
NAVY ELECTRONICS LAB SAN DIEGO CALIF
Pagination or Media Count:
As a part of the ANSQS-23 Modernization Program, NEL Problem J714, and particularly that portion of the program directed to the description of possible sonar self noise problem areas the work reported in this memorandum is an effort to point out one aspect of the Self Noise Picture that is, locally produced noise pressures caused by the vibration of the ANSQS-23 transducer assembly. The method of testing consisted of measuring local water borne near field sound pressures at ten 10 discrete probe hydrophone positions about the periphery of the Sonar Transducer TR-208SQS-23, the transducer while it was vibrated in each of two directions by vibration generators shakers. The transducer was suspended in water so that the shaker assembly was above water. Suspension of the entire assembly was by means of a truck crane. Also described is the sequence of assembly and final positioning of the transducer for testing. For convenience and rapid data acquisition outputs of the pre-calibrated accelerometers and Probe Hydrophones were analyzed and recorded sequentially as the shakers were vibrated with a sweep control frequency ranging from 50 cps to 5,000 cps.
- Test Facilities, Equipment and Methods
- Acoustic Detection and Detectors