The sound produced by the vacuum cleaner amounts to about 68 decibels, equivalent to the noise level of a normal conversation.

这种吸尘器制造的音量大约在68分贝，相当于稍微大声点的普通谈话音量。

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

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。

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Aiming at the traffic noise problem of Lhasa, the author USES artificial neural network theory and method to predict the equivalent consecutive sound level of traffic noise in Lhasa.

针对拉萨市道路交通噪声污染问题，运用人工神经网络理论和方法对拉萨市道路交通噪声的等效连续声级进行预测。

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