前言在1974年底到1975年初,我们对扬声器的关键部件——纸盆,进行了研究和探索,采用了一种高分子结晶材料——碳纤维,使纸盆结构有了显著改进。新纸盆不仅刚性(或机械强度)大大提高,同时实现了轻量化。碳纤维纸盆扬声器的试制品,经上海电器科学技术研究所测试,与不加碳纤维的扬声器相比,平均灵敏度提高1.5dB以上,接近国外资料报导的1.6～2.0dB的水平。一、扬声器纸盆和碳纤维扬声器是电声传输系统中比较薄弱的环节,往往由于扬声器性能不好而影响了重放音质。因为声信号的频率范围很宽,多达九、十个倍频程,要让机械系统在这么宽的频段内无失真地重放原音,是相当困难的。近年来,国际上致力于提高磁通密度(采用高级合金钢)和减轻纸盆等措施来改进扬声器的音质。目前,国内扬声器的生产中也同样存在纸盆刚性不好的问题,在振动中容易引起 Preface From the end of 1974 to the beginning of 1975, we researched and explored the paper cone, the key part of the loudspeaker, and adopted a kind of macromolecule crystalline material - carbon fiber to make the structure of the cone significantly improved. The new cone is not only rigid (or mechanical strength) greatly increased, while achieving a lightweight. Carbon fiber cone speaker prototype products, tested by the Shanghai Electric Science and Technology Institute, and without carbon fiber speakers, the average sensitivity increased by 1.5dB or more, close to the foreign data reported 1.6 ~ 2.0dB level. First, the speaker cone and carbon fiber speaker is a relatively weak link in the electroacoustic transmission system, often due to poor speaker performance and playback quality. Because acoustic signals have a wide frequency range of up to nine or ten octaves, it is quite difficult for mechanical systems to reproduce the original sound without distortion in such a wide frequency band. In recent years, international efforts to improve the magnetic flux density (using advanced alloy steel) and reduce paper cone and other measures to improve the sound quality of the speaker. At present, the domestic loudspeaker production also has the problem that the rigidity of the paper cone is not good, which is easily caused by vibration