The noise of fan outlet is a chief noise source in the coal mine.

对于煤矿噪声分析，主要噪声源是风机出口噪声。

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The harnessing of noise and smust to boiler are studied, pugging and ventilation are adopted to harnest noise of fan. Desulfurizing QYD type dust-remove equipment is adopted to harnest smust.

通过对煤矿锅炉噪声治理和烟尘治理的研究，阐述了通过采用隔声罩和机械通风冷却设施对引风机和鼓风机的降噪治理。

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Consider going to sleep to the sound of white noise, either from a bedside fan or a machine that generates calming sounds.

考虑在无噪声中睡觉，无论是从床头风扇还是机器产生平静的声音。

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Jobs considered the noise of a fan to be industrial and inelegant.

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Rounding out the list, Acer moved the mics to the front, and also updated the cooling system with the promise of less fan noise.

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The noise was the sound of a cracked engine fan disk shooting out of the tail engine and freakishly hitting in the worst possible spot.

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