2. Impact of radiated energy on the environment

2.1 Transmission of reverberant energy from a room to the outside world

Another consequence of the relationship e ₂ = k ₂ e ₁ appears in predictive studies of noise transmission in the environment.

Determining sound levels in a room with known absorption characteristics enables us to predict sound levels at different points in the environment.

To determine the sound level at a point P outside a room containing an omnidirectional source located at M (figure 3 ).

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