Chapter 3

Sound isolation

The weight of air. Interaction of the air vibrations with room boundaries. Reflexion, transmission and absorption. Reflexion and absorption as means of isolation. The mass law, damping and decoupling. Frequency dependence of isolation needs. Level dependence of isolation needs vis-à-vis the non-uniform ear response. Floor, wall and ceiling isolation. Weight considerations. Material densities. The journey through a complex isolation system. Considerations regarding impact noises. Matters influencing studio location choice.

3.1 Vibrational behaviour

Sound waves in air can be remarkably difficult to stop. Air is a fluid of considerable substance. It can support 500-ton aeroplanes and blow down buildings. In fact, it ...

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