英国自动电话公司研制出—种可随身携带的高级音箱,能在保证高质量低音的前提下,放进衣袋中。目前,高级音响装置最臃肿的部分是音箱。音箱的体积,大的与床头柜相当,小的也有鞋盒那么大。高级音响的音箱之所如此大,是因为要显现低频音质,就需要配备较大的电动扬声器。现在,英国自动电话公司较好地解决了这一问题。他们研制的微型音箱,由19个超声压电辐射器组成,其中的一部分,能发出20万赫兹固定频率超声。除超声振荡器外,其它 British auto-phone company developed a kind of portable high-level speakers, can guarantee high-quality bass under the premise, into the pocket. At present, the most bulky part of the high-end audio equipment is the speaker. Speakers the size of a large bedside cabinets quite small, there are small shoebox so big. The speakers of advanced audio are so large because of the need to have a larger electric speaker to show low-frequency sound quality. Now, the British auto-phone company to solve this problem. They developed a miniature speaker that consisted of 19 ultrasound piezo radiators, some of which emitted 200,000 Hertz fixed-frequency ultrasound. In addition to ultrasonic oscillator, other