The foam besides dimensions has the following characteristics:
- density
- size of cell
- % open cell
- Young¡¯s modulus of the foam
- Young¡¯s modulus of the material
- acoustical Q-factor
If you match all of the above you _may_ recover the original acoustic properties of the mic. If not, then adding any foam is as good or worse than leaving it without any foam at all.?
Hint: open-cell foam is best cut with razor-sharp blade ?when the foam is fully soaked with water or, better yet, fully submerged in it.?
Dibutil Ftalat