Normal
yep... u r rite... B)bitumen for sound dampening... where is absorb vibration n eliminate resonance..superlon is for sound insulation.. where it block de sound from one side to de other side using closed-cell foam...
yep... u r rite... B)
bitumen for sound dampening... where is absorb vibration n eliminate resonance..
superlon is for sound insulation.. where it block de sound from one side to de other side using closed-cell foam...