New Portable Hybrid Method of Compressor Noise Level Calculation from Vibrations Measurements

The air conditioning and refrigeration systems noise consideration is continuously growing, implying more and more compressor noise measurements [1], even in-situ [2][3]. This article will introduce a new validated finite-element method to obtain the compressor noise from vibration measurements from standard test rig or directly in the field. We will describe the methodology; the devices & tools used for the analysis, their implementation, and we will compare the results to standardized measurements made on a refrigerant hermetic scroll moto-compressor in an acoustic room. Additional investigation benefits will be put forward, as frequency noise peaks identification and noise spatial mapping on the compressor shell.