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根据组合扬声器的指向性和频率关系来评价组合扬声器是很重要的。加里福尼亚州的James B.Lansing音响有限公司设计了一个微型计算机控制的测试台。该测试台由一个可以遥控的转椅、1/3倍频程实时频谱分析仪、粉红噪声发生器、带通滤波器、均衡器和功率放大器组成。转椅能以不同的速度在两个方向上转动,目前采用凸轮微型开关系统监控转椅的位置和扬声器的方向。
It is important to evaluate the combined loudspeaker based on the directivity and frequency of the combined loudspeaker. James B. Lansing Audio Co., Ltd. of California designed a microcomputer-controlled test bed. The test bench consists of a remote swivel chair, 1/3 octave real-time spectrum analyzer, pink noise generator, band-pass filter, equalizer and power amplifier. The swivel chair can rotate in two directions at different speeds. At present, the cam micro-switch system is used to monitor the position of the swivel chair and the direction of the speaker.