PARAMETRIC LOW-FREQUENCY SOUND SOURCE

摘要

PURPOSE:To provide a parametric low-frequency sound source capable of improving the conversion efficiency from a high-frequency primary wave to a low-frequency secondary wave and being used in a moving object. CONSTITUTION:A transmitter 1 driven by a parametric transmitting system utilizing the nonlinear effect of acoustic waves and a solid acoustic matching layer 3 containing a bubble group in a material and arranged on the radiation path of the acoustic waves from the transmitter 1 are provided.