Saturation of Plane Acoustic Waves and Notes on the Propagation of Finite-Amplitude Spherical Waves.
Abstract
This paper investigates saturation of plane acoustic waves in an air-filled tube. Saturation a state in which the signal amplitude at a field point approaches a limiting value, independent of source amplitude--is caused by nonlinear propagation distortion. The author observed it in a 30-m long, 5-cm i.d. progressive wave tube. Measured saturation curves were obtained for the following source conditions: sound pressure levels from 110 to 163 dB, frequencies from 500 Hz to 3500 Hz. The model equations of Merklinger and Rudnick were adapted and solved to give theroetical predictions for the fundamental component of the wave. The Merklinger model is found to give good results at low levels, and the Rudnick model at high levels. Measurements generally confrim theoretical predictions. The effect of dispersion due to the tube wall boundary layer was analyzed separately and found to be not great for the fundamental component. Its effect layer was analyzed separately and found to be not great for the fundamental component. Certain aspects of the propagation of spherically spreading waves of finite amplitude was also studied. A graphical method for assessing the importance of nonlinearity on spherical waves is discussed. New theoretical results for weak waves and for strong waves were found.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1977
- Accession Number
- ADA035694
Entities
People
- Don A. Webster
Organizations
- University of Texas at Austin