EVALUATION OF THE ACOUSTIC RESPONSE OF AN AIR-WATER SIREN.
Abstract
The characteristics of air-operated sirens are described in the literature. There are also papers devoted to sirens using liquids. This paper is concerned with the characteristics of a siren which can function with either water or air. The siren was built and operated with air at a maximum pressure differential of four psig and at seven psig with water over a frequency range of from 50 Hz to 1 kHz. Comparison of the acoustic output of the device for both fluid media showed that, in general, there is little physical change in the siren response; the output pressure fluctuation has a saw-tooth wave form. Fluid viscosity produces a damping effect on the response of the liquid-operated siren so that a more nearly sinusoidal pressure wave form occurs. In addition, it is found that the flow coefficient is dependent on frequency. The experimental results indicate that liquid-operated sirens should be further developed for use as underwater sound sources. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1968
- Accession Number
- AD0675946
Entities
People
- D. Muster
- W. S. Mitchell
Organizations
- University of Houston