A Theory of Reflections from Gradual-Transition Sound Absorbers

摘要

IN THIS report, reflections from gradual-transition linings for anechoic tanks are treated theoretically by considering the propagation of compressional waves in stratified media. Typical linings are comsidered in detail to determine theoretically the proportion of transition width to total lining width that produces minimum reflections. A comparison of the theoretical results with experimental data for a cone-type underwater of the theoretical results with experimental data for a cone-type underwater lining indicates that the one-dimensional theory gives useful results for cone and wedge linings.