Westbury products are independently tested by a third party UKAS accredited test centre to current British and European Standards
The Weighted Sound Reduction Index (Rw) is a number used to rate the effectiveness of a soundproofing system or material. Increasing the Rw by one translates to a reduction of approximately 1 decibel in noise level. Therefore, the higher the Rw number, the better a sound insulator it will be.
The following test results demonstrate the sound reduction index of various Westbury products in accordance with BS EN ISO 10140-2:2010. Each result is followed in brackets by an adjustment (C,Ctr) These are figures you deduct for an accurate reduction index of pink noise (C) and Traffic noise (Ctr).