空调器室外机噪声源识别精度试验研究

Noise source indentification precision test on outdoor unit of air conditioner

利用近场声全息技术对变频空调器室外机压缩机及管路所在右侧面特征噪声进行试验研究,经全息逆推算法得到重建面上声压、质点振速以及声强等声学参数的分布情况,并对比三者的识别精度。结果表明:重建面上得到的声源图包含的声源信息相比全息面更详尽;采用声压、质点振速以及声强重建声源面均能够有效定位室外机的主要噪声源,其中声强对室外机噪声源识别精度最高。

The typical noise of compressor and tubes at the right lateral outdoor unit of frequency conversion air conditioner is studied by test based on near-field acoustic holography technology. Using the holography backstepping algorithm, the distribution situation of the acoustic parameters on the construction surface, including sound pressure, particle velocity and sound intensity, are obtained, and the indentification precision of them are compared. The results show that the sound source chart achieved from the construction surface has more sound source information compared that from the hologram. All of the construction sound source surfaces using sound pressure, particle velocity and sound intensity can locate the main noise sources of outdoor unit, while using the sound intensity can gain the best indentification precision.