Underwater Audio-Frequency Transmission as a Function of Simulated Distance (In Models).
Abstract
The ultrasonic modeling technique is being used to investigate sound propagation in the shallow ocean in connection with a project on basic aspects of underwater speech and hearing. The ultrasonic simulation experiment is carried out in a water-filled concrete tank 3 ft x 4 ft x 4 in side-lined with sound-absorbing rubber matting and bottom-lined with soft rubber to simulate sand. The electroacoustical transducers are a matched pair of lead zirconite-titanate piezoelectric crystals of frequency 400 kHz with wire probes projecting beneath the water surface. One actual problem simulated is one in which field measurements were previously taken at 16 frequencies from 0.10 kHz to 5 kHz in the Gulf of Mexico, in 31 meters of 76F water over a flat sandy bottom. Using a single frequency, the modeling experiment simulates these 15 frequency, the modeling experiment simulates these 15 frequencies by appropriate distance sealing. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 12, 1971
- Accession Number
- AD0737746
Entities
People
- Harry Hollien
- Howard Rothman
- Richard A. Rhodes Ii
- Stephen Feinstein
Organizations
- University of Florida