同时分析了现场扩声中极易出现的交流声、啸叫声产生的原因，并介绍了有关应对的方法。参考文献7。
It also has analyzed the reason why hum and whistle cry are frequently produced and has introduced the method to deal with them. 7 refs.
同时分析了现场扩声中极易出现的交流声、啸叫声产生的原因，并介绍了有关应对的方法。参考文献7。
It also has analyzed the reason why hum and whistle cry are frequently produced and has introduced the method to deal with them. 7 refs.
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