Suppression of sound from external ventilation systems
Norisol was given the job of suppressing the noise from several ventilation systems placed on the roof of a large manufacturing company situated near a residential area.
Noise measurements showed that the dB from the company’s ventilation systems exceeded the allowed noise level at the boundary.
The task was to install a noise screen with a view to reducing the dB values at the boundary to a legal limit.
Norisol installed 120 metres of noise screen along the perimeter of the roof and surrounding the ventilation system. The screen is 200 mm high and produced of 50 mm lacquered polyester. Norisol has also produced and installed the covering and spacer iron.
The work was carried out in 2018 by two fitters over a three week period.
The total size of the noise screen is approx. 240 square metres.