Noise occurs as a result of mechanical systems motion during normal operation and may be associated with its various moving parts. In this work vibration as well as noise measurements are carried out on two case studies; a simple beam structure and an air compressor. The comparison of vibration and noise spectra has been very useful in identifying dominant noise sources. This represents the first step in selecting an economic method for noise control. In the case of the compressor, the addition of rubber pads under its base has greatly reduced both the overall noise level and its fluctuations with time.