结论作业人员长期在平均噪声强度低于卫生标准下工作，仍可有一定程度的心电图改变和听力损失。

Conclusion ECG and hearing in workers could be affected with long-term exposure to medium low intensity noise, even if the exposure average level was lower than the limited level of hygienic standard.

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结论平均等效声级可以作为评价和比较工业企业的噪声危害程度的综合指标。

Conclusion the average equivalent sound level maybe as comprehensive index to evaluate the noise hazard in industrial enterprises.

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因为通常电声设备技术指标给出的是噪声准平均值电平，而不是噪声准峰值电平，这一点应加以注意。

Because normally the electro-acoustic equipment, technical specifications are given quasi-average noise level, rather than quasi-peak noise level, this should be noted.

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