Why?
That material is absolutely perfect for sound deadening. Its not like you'll actually see the material.
When your garage door vibrates too much, what do you do? Put a piece of rubber between the opener and the braces it hangs from. There are countless examples of this, and this material is really ideal for killing NVH problems.
If I build a recording studio, maybe I'll line the wall with old shoes, smells like a good idea.