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美国一家公司最近制成一种数字——声音转换器。这种装置从计算机或其他设备中接收数字信息,用光扫描以与事先存贮好用来产生声频信号的存贮信息作比较。被选的信息模示用光阻摄象管或导光板进行记录,并放大和变换成声音。在用光阻摄象管时,信息模示经比较器线路加以选择后,就进行“光剖”并成行地投射在光阻摄象管的摄象体上。这个系统产生的声频时间可达1秒。尽管频带窄、
A U.S. company recently made a digital-to-sound converter. Such devices receive digital information from a computer or other device and are optically scanned for comparison with stored information which is stored in advance to produce an audio signal. The selected message is recorded with a photo-resist tube or light guide plate and amplified and converted into sound. In the use of photoresistor, the information mode is selected by the comparator circuit, the “light section” and in-line projection of the phototool tube photographic body. This system produces audio for up to 1 second. Despite the narrow frequency band,