ACOUSTICAL IMPEDANCE MATCHING DEVICE FOR A HIGH IMPEDANCE TRANSDUCER

摘要

A miniature acoustical impedance matching device for use with a high acoustical impedance transducer which converts electrical waves to sound waves and must be acoustically impedance matched to prevent distortion. The device includes a housing with an acoustical chamber formed therein. A first aperture is formed in the housing for allowing exit of the sound waves from the chamber, and a second aperture is formed for allowing entry of the sound waves from the transducer. The first aperture acts to inhibit exit of the sound waves for developing a predetermined sound wave pressure in the chamber. The predetermined sound wave pressure acts to provide an acoustical impedance match for the transducer to reduce or prevent distortion. A passage is coupled to the first aperture for allowing emission of the sound waves.