NOVEL SOUND SOURCES
Abstract
Two different types of LF high-intensity sound sources have been developed which have both military and commercial potentialities: The underwater spark sound source is suitable for explosive echo ranging, particularly from a submarine, and shows promise as a source for long-range, active detection and for long-range underwater signaling. This source has been tested at a depth of 300 feet below the surface and generated peak pressures corresponding to an acoustic level in excess of 3 million watts for a broadband nondirectional condition. In the 1000-4000-c/s frequency band, a corresponding acoustic level in excess of 300,000 watts was developed for a nondirectional condition. The pneumatic sound source, is probably the simplest generator of underwater sound yet discovered (in its lightest form it weighs less than 1 pound). This source has generated a peak acoustic level of over 4000 watts for a nondirectional condition, in the frequency range between 5 and 300 c/s. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 17, 1960
- Accession Number
- AD0260282
Entities
People
- L.r. Jr. Padberg
Organizations
- Navy Electronics Laboratory