NRC – Noise Reduction Coefficient – Reference
All NEWMAT membranes can be treated acoustically (microperforation) @ 250 000 micro perforations / sqm (10.764 sf)
Acoustic membrane only with a 100mm high plenum, AlphaW = 0.45 & NRC 0.45
Double NEW/ACOUSTIC membrane, AlphaW = 0.65 & NRC = 0.55
Acoustic membrane + 20mm thick acoustic liner with a 100mm high plenum, AlphaW = 0.70 & NRC 0.70
Acoustic membrane + 40mm thick acoustic liner with a 100mm high plenum, AlphaW = 0.75 & NRC 0.90
The absorption performance is really interesting as excellent results are achieved with low frequencies around 500 Hz. Installing a stretch ceiling is the perfect solution, since traditional acoustic absorbents (mineral wool) perform rather poorly at these frequencies.