2. Principles of sound insulation

2.1 Wall acoustics

Acoustic insulation is based on three main principles: the law of mass, the law of mass-spring-mass, and the law of tightness.

• Mass law

  The heavier it is, the better it insulates. The acoustic performance of a single wall, made of a single material, varies according to its nature and mass per unit area. For example, for the same thickness, a concrete wall insulates better than a plasterboard wall, because concrete is heavier than plaster for the same volume. The sound insulation level...