Nonlinear interaction of sound waves in water: Experiments with parametric arrays
Abstract
The theory of nonlinear interaction of sound waves and approaches to numerical prediction of parametric sound generation in water are presented. Lighthill's wave equation, nonlinearity in fluids, second order wave equations, collinear plane waves, attenuation effects, and calculation of the second order sound field are discussed. Sound pressure is measured as a function of range and azimuth angle with a hydrophone. A discrepancy between measured and predicted curves based on difference frequencies is shown.
- Publication:
-
Unknown
- Pub Date:
- October 1979
- Bibcode:
- 1979nisw.rept.....V
- Keywords:
-
- Angles (Geometry);
- Electroacoustic Waves;
- Nonlinear Systems;
- Parametric Amplifiers;
- Water;
- Anechoic Chambers;
- Elastohydrodynamics;
- Electroacoustic Transducers;
- Frequency Control;
- Numerical Analysis;
- Acoustics