A Model for the Generation of Noise by Bubbles Formed in Breaking Waves
Abstract
The characteristics of the ambient noise field in the sea are important to the performance prediction, detection capabilities and optimum use of sonar systems. The aim of ambient noise studies is to improve knowledge and prediction of the ambient noise field in areas of importance. These studies involve the development and validation of models for the generation and distribution of the noise. This report presents a model for the generation of high-frequency, wind-related noise. The model is based on the assumption that the noise is generated by air bubbles entrained in whitecaps (breaking waves). The characteristics of the noise predicted by the model compare favourably with published observations, regarding directionality, level and spectral form. The development of the model involves a statistical approach in terms of an air/ water mixture. This work concludes the theoretical modelling of high-frequency, wind-related noise. The results contribute to progress in identifying the sources of wind-related noise in the sea. A later report will present the results of experimental observations of the noise from whitecaps at sea.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1988
- Accession Number
- ADA200461
Entities
People
- R. D. Hollett
- R. M. Heitmeyer
Organizations
- SACLANT ASW Research Centre