The sound insulation of the pressure enclosure

Professional Definition

The sound insulation of a casing refers to the reduction of the sound power level achieved by using a casing for the actual sound source spectrum.

In acoustic engineering, it is an indicator of how effectively the casing 'traps' acoustic energy inside. Although the name includes the word 'pressure', the definition refers to the reduction of the sound power level (the total energy emitted by the source per unit of time). It is a cumulative measure that indicates how much less noise the machine emits to the entire room, not just in one direction.

Acoustics in Simple Words

Think of water boiling in a pot. When the water is boiling, you can hear bubbling throughout the kitchen. When you cover the pot with a lid, the noise becomes significantly quieter throughout the room. The sound insulation of the casing is precisely this difference in the total noise filling the kitchen before and after putting on the 'lid'. It's not about whether you hear less while standing by the stove, but about the pot as a whole emitting less sound energy outside.

Summary

This term defines the effectiveness of the casing in reducing the total noise emission of the device. It is crucial in designing soundproofing for machines that affect the overall acoustic environment in large industrial halls.