噪声异常压缩机的声诊断分析

通过声品质评价方法分析了噪声异常转子压缩机试验样机，并计算出A声级、响度、粗糙度和尖锐度作为声品质的客观评价指标，结果表明与正常压缩机相比，该噪声异常压缩机具有较差的声品质。声阵列技术能够精确定位复杂形状的目标声源，与传统采用声级计测试相比，能够获得更加丰富的声场信息。为了诊断出压缩机的异常噪声，通过声阵列技术在全频段对该异常压缩机进行了声源识别定位分析，找到了影响压缩机噪声的关键频率点及相应的噪声源，从而为压缩机噪声的改善提供了有力证据。

Analysis of Noise Abnormal Compressor Using Acoustic Diagnosis Techniques

A noise abnormal rotary compressor is analyzed with sound quality evaluation method.Sound power level （A）, loudness, roughness and sharpness are calculated as objective evaluation parameters , and the results indicate that the abnormal compressor has a poor sound quality compared with a normal one.Acoustic array technique can i-dentify target sound source of complicated shape accurately , and get rich sound field information compared to tradi-tional near-field measurement with a sound level meter.In order to diagnose the abnormal noise , the compressor sound sources are identified and located in full frequency range through acoustic array method .As a result, the key frequencies are diagnosed and the corresponding sources are also located , which provide the effective evidence for noise improvement.