Acoustic Foam

Acoustic foam is one method of creating a controlled acoustic environment within a room. the qualities that give acoustic foam its sound absorption properties is a combination of 3 factors the foams density hardness and air permeability. Do not think that a heavy density acoustic foam will perform better than a lighter density acoustic foam they perform differently, please look at the sound absorption coefficients on the attached report where a 25 kilo m3 acoustic grade foam was compared with the same grade of acoustic foam formulated to a 41 kilo m3 heavy density.

acoustic foam sound absorption test results

AFW45 (25 kilo M3 ) acoustic foam wedge tile 45mm thick

PFW45 ( 41 kilo M3 ) acoustic foam wedge tile 45mm thick

AFW100 ( 25 Kilo M3 ) acoustic foam wedge tile 100mm thick
AFW45 PFW45 AFW100

125Hz 0.10 0.05 0.29
250Hz 0.29 0.28 0.62
500Hz 0.50 0.60 0.97
1000 Hz 0.68 0.81 1.09
2000 Hz 0.74 0.97 1.19
4000 Hz 0.98 1.05 1.13
NRC 0.55 NRC 0.65 NRC 1.13

As you can see from the results above the results show a marginal improvement using a denser foam in the in high frequency range but to the determent of the lower frequency results in the 45mm thick tile.

By using the same 25 kilo acoustic foam but making the wedge tile 100mm thick not only are the high frequency absorption results much improved but also the low frequency results have improved accordingly also. thus proving that the 25 kilo acoustic foam has much more stable sound absorption properties. which can be controlled more accurately by altering the tile thickness to improve low / high frequency issues.

Please always look for the acoustic foams acoustic test results showing the sound absorption coefficients, as often convoluted egg box packaging grade foam can be passed off under the guise of acoustic foam.

More details of the acoustic tiles can be seen on this web site

acoustic foam

All foam products supplied upon leaving our factory conform to the requirements of Schedule 1, part 1, of the Furniture and Furnishings (Fire) (Safety) Regulations, S.I. 1324 of 1988 (amended 1989)(Amd 1993), and are also suitable for applications requiring FMVSS302. The fatigue class is based on BS3379

The acoustic foam grade we use is specifically formulated for acoustic applications by one of the UK’s leading specialist foam manufacturers. it has been used for many years as the basic sound absorption foam due to its excellent performance for a wide range of applications. It may be used for acoustic enclosures, studio wall paneling, air handling units (AHU’s), air conducting, cab linings and just about any other application where a controlled acoustic sound level is required

CNC Profile Cut Open Cell Melamine Treated Grey Acoustic Foam, 25kg / m3 Density Foam which has a controlled permeability and open cell structure that gives optimum acoustic performance for a foam of this density. Hardness 125 to 155 Newton’s, Please note all polyurethane foam will react to UV light and can fade and yellow over time this however will in no way affect the foams sound absorption performance

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