电声转换器是把声能转换成电能或电能转换成声能的器件,电声工程中的传声器、扬声器和耳机是最典型的使电能、声能之间相互变换的器件。这些器件统称为电声转换器,亦称电声换能器。广义的电声应用的频率范围很宽,包括次声、可听声、超声换能器。属于可听声频率范围内的电声换能器有传声器、扬声器、送受话器、助听器等等。按照换能方式,它们又可以分成电动式、静电式、压电式、电磁式、碳粒式、离子 Electro-acoustic transducers are devices that convert acoustic energy into electrical energy or electrical energy into acoustic energy. Microphones, speakers, and headphones in electro-acoustic engineering are the most typical devices for transforming electrical and acoustic energy. These devices are collectively referred to as electroacoustic transducers, also known as electroacoustic transducers. Generalized electroacoustic applications have a wide range of frequencies, including infrasound, audible sound, and ultrasonic transducers. Electroacoustic transducers belonging to the frequency range of the audible sound include microphones, speakers, earpieces, hearing aids, and the like. According to the transduction method, they can be divided into electric type, electrostatic type, piezoelectric type, electromagnetic type, carbon type, ion