The slight cushion softens the impression whenever a soundwave hits the wall, improving its soundproofing efficiency. Of course, you could install mass loaded vinyl (MLV) around an current wall. Ensure the wall floor is clear and use proper adhesives or fasteners to safe the MLV properly for optimum overall performance. https://mass-loaded-vinyl98872.iyublog.com/37550622/mass-loaded-vinyl-fundamentals-explained