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本文通过对一煤矿主扇噪声的分析，找出其中的主要噪声源，并针对主要噪声源进行了十分有效的降噪处理，达到了预期效果。特别是对扩散器口噪声的治理，具有推广价值。
This paper analyzes the main fan noise of a coal mine to find out the main noise sources and carries out a very effective noise reduction process for the main noise sources, which achieves the expected results. Especially for the diffuser noise management, with the promotion of value.