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扬声器大功率谐波失真最能反映重放音质的优劣,长期以来,国内外音频界都想测量达一重要参数而又未能实现。84 A型仪,就是我们根据新近提出的扬声器大功率谐波失真测试原理(见《电声技术》1984年第6期“扬声器大功率谐波失真测量”一文)而独创设计的微电脑化电子仪器。84A型仪内装有多种精密脉冲电路和一整套A/D模数转换—微电路—D/A数模转换数字信号处理系统,它除了能在普通房间里独特地完成扬声器大(小)功率谐波失真测量外,还可兼作同步触发猝发音发生器、双脉冲发生器、矩形波发生器和可调时间窗等仪器使用,从而可与其它仪器组合在一起,完成下列多种声学测量:
High-power loudspeaker harmonic distortion best reflects the pros and cons of playback quality, for a long time, the audio community at home and abroad want to measure an important parameter but failed to achieve. 84 A-type instrument, that is, we are based on the newly proposed speaker high-power harmonic distortion test principle (see the “electro-acoustic technology” No. 6 of 1984 “loudspeaker high power harmonic distortion measurement” . 84A instrument equipped with a variety of precision pulse circuit and a complete set of A / D analog-digital conversion - micro-circuit D / A digital-to-analog digital signal processing system, which in addition to ordinary speakers in the room to achieve a unique small In addition to harmonic distortion measurements, it also doubles as a simultaneous trigger burst tone generator, dual pulse generator, rectangular wave generator, and adjustable time window for use with other instruments to accomplish a variety of acoustic measurements including: