建议明确噪声指标，须考虑与室内设备的噪声叠加问题，不符合要求的机组、空调通风系统必须有消声处理措施。

The noise index should be definite, and the problem of noise integrating phenomenon with the indoor equipments should be considered. The improper units should have the noise elimination measure.

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以控制汽车加速噪声为背景，通过对某微型卡车排气消声器的测试分析结果，提出相应的改进措施。

For the sake of the noise control of automotive noise, an improved method is presented through some muffler of a subminiature truck tests on an engine test bed.

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根据声源的频谱特性在其前后配置合理的管道式消声器、金属外壳式消声器、结构式消声器作为消声降噪的措施。

According to the spectral characteristic of the noise source, the tube-type muffler, metal-enclosure muffler, structural-type muffler can be equipped before and after the noise reduction devices.

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