Noise levels exceeding an average sound pressure level of 90 dB(A) are considered detrimental to hearing, with the extent of harm dependent on the intensity of the noise and the duration of exposure. The noise generated by an air compressor mainly has three parts: inlet noise, radiated noise from the compressor’s surface, and noise emitted by the piping system. Indoor noise levels are influenced by the combined sound emissions of all sources within the space and the acoustic characteristics of the room itself, including the sound-absorbing properties of walls, floors, and ceilings. When considering the overall sound pressure level, the compressor’s noise is not always the most significant factor; the noise produced by the prime mover must also be taken into account.