This part of ISO 11546 specifies in situ methods for the determination of the Sound insulation performante (insertion loss) of machine enclosures.lt applies to a total enclosure only and not to the individualPanels from which the enclosure is made.NOTES1 Sound insulation for enclosure Panels such as wall elements, doors, windows, silencers, etc. should be measured in accordance with other relevant Standards.2 Related Standards concern noise-attenuation measurementsof enclosures under laboratoty conditions (ISO 11546-1) and cabins (ISO 11957).The measurement methods specified in this part of ISO 11546 are based on International Standards in the series ISO 37