一、概述由于耳机轻便、不需要大功率放大器,不干扰周围环境,对房间也无声学要求,且音质并不比优质组合扬声器箱逊色,因此,头戴耳机在放声系统中的应用日益广泛.近年来,随着立体声广播录音事业的迅速发展,作为重放立体声的耳机,不但在数量上,而且在放声质量上已有明显的突破;在换能方式上也由单纯的电动型,发展成为等电动型、静电型(驻极体)、压电型(高分子薄膜)等多个品种.立 First, an overview Because headphones lightweight, does not require high-power amplifier, does not interfere with the surrounding environment, the room is also no acoustic requirements, and the sound quality is not inferior to high-quality combination speaker box, therefore, headphones in the sound system is increasingly widespread. With the rapid development of stereo broadcast recording, as a stereo headset, not only in quantity, but also in the sound quality has been a clear breakthrough in the conversion mode from purely electric type, the development of such as Electric type, electrostatic type (electret), piezoelectric type (polymer film), and other varieties. Li