2” acoustic foam is 5% less efficient than sound blankets but it is more than 8 times more expensive. 1” acoustic foam is 30% less efficient than sound blankets but it is 5 times more expensive. Therefore, 1 inch acoustic foam is 30% less absorptive and less efficient than acoustic blankets.) For example absorption of 1” foam is 50% (NRC 0.5) and absorption of blankets 80% (NRC 0.8). 
(NOTE: For ease of comparison, we compare all products to NRC 1.0 as a 100%, not absorption of blankets (NRC 0.8). In terms of price, acoustic blankets beat acoustic foam hands down.Įven at the first glance, one can see a huge difference in price versus efficiency:
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