System hardware circuit audio digital signal source achieve this functions: sound signals, sound intensity level control, data communications, liquid crystal display, alarm and power.
Compared with the original soundlevel meter, the new measuring system has the same accuracy and was much convenient in signal measuring and data processing.
结果表明,在测量精度不变的前提下,新测量系统在测量和数据处理方面明显优于原声级计。
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The field pulse signal forming and width control circuit generates a field pulse signal A with the width being controlled by the accompanying sound electric level.