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A Guide to acoustics

If you’re looking for a partition to achieve an acoustic performance the guide below gives indicative levels of what can be achieved using configurations of glass thicknesses in single or double glazed applications.

Please remember there are many factors that can affect the performance of a partition wall including flanking sound travelling above a suspended ceiling, air grills, conditioning ductwork and transition details between walls. Most tested systems will tend to perform up to 5dB better in a test environment than in an installation. Please contact our experience staff who will be pleased to provide assistance.

Weighted sound reduction index Rw Speech Privacy Level System
25dB Normal speech can be overheard Single Glazed
30dB Loud speech can be heard clearly Single Glazed
35dB Loud speech can be heard and distinguished in normal conditions Single Glazed
40dB Loud speech can be heard but not distinguished Double Glazed
45dB Loud speech can be heard faintly but not distinguished Double Glazed
50dB Loud speech can only be heard faintly with great difficulty Double Glazed


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