Through improving muffler and sound absorption and insulation for the engine, we made the car meet the requirement of the second stage of GB1495一2002 regular.
通过改进消声器和对发动机主要噪声源进行吸隔声使该车满足GB1495一2002法规第二阶段的要求。
参考来源 - 新型轿车车外加速噪声的分析与控制研究The fan noise is the biggest noise source in the coach interior noise,however,contributions of oil pan and muffler changed with different places and rotational speed.
风扇噪声对车内各位置噪声贡献最大,且随着转速增加而变大;此外,油底壳、消声器等声源对于车内不同测点,在不同的转速下也有较明显的贡献。
参考来源 - 客车内外噪声控制关键技术及工程应用研究·2,447,543篇论文数据,部分数据来源于NoteExpress
N-COUNT A muffler is a device on a car exhaust that makes it quieter. 消音器 [美国英语]
N-COUNT A muffler is a long scarf that you wear around your neck to keep warm. 长围巾
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