Sound absorption coefficient for Polypropylene Plastic

[AllenMueller]

Does any one know a sound absorption coefficient for polypropylene plastic? I'm just looking for an estimate so any help would be great. Thanks in advance

 

[okdb]

Hi,

In what form is your plastic? in sheat, foam, loose microballs? To have any absorption properties, your product has to be foam with open cells.

cheers,
OkdB

 

[pheon]

The sound absorption coefficient of plastic materials is also frequency dependent.