Acoustic foam

[Ron Nossaman]

> I remember doing a lot of looking online at acoustic foam after this 
> job.  If memory is correct, it is much thicker than one you can buy for 
> a mattress (at least at that one WM).  And, the acoustic foam is quite a 
> bit denser, which theoretically will reduce sound more.  If it's worth 
> the price difference might depend on the situation ( i.e., what level of 
> sound reduction is needed).

The most effective acoustic barrier is mass, so acoustic foam 
should be considerably heavier than anything a mattress would 
be made from.
Ron N