我厂L型往复式空气压缩机(5L-40/8),经现场实测,其进口噪声要比机壳辐射噪声高10～25dB(A)。1983年,我们为此而组装上了某厂用超细玻璃棉制造的消声器。经使用发现,该消声器不但结构复杂,且芯子部件质量很差。在累计运行近 Our factory L-type reciprocating air compressor (5L-40/8), measured by the field, the imported noise than the cabinet radiation noise 10 ~ 25dB (A). In 1983, we assembled a muffler made of ultrafine glass wool at a factory for this purpose. It has been found that the muffler not only has a complicated structure but also has poor core components. In the cumulative run nearly