Top 10 noise control techniques
Extraction, ventilation, cooling, openings in walls and enclosures. Technique . Instead of fitting silencers, it is often possible to achieve a 10 20 dB reduction in airborne noise from a duct or opening by lining the last bend in the ductwork with acoustic absorbent foam or rockwool / fibreglass. Alternatively, construct a simple absorbent lined right angled bend to fit on the opening






































