5. Study of stationary reverberant fields in coupled rooms 5.1 Exchanges of reverberant energy between two rooms connected by an opening Fundamental relationships Consider two neighboring rooms of respective volumes V1 and V2 communicating via an opening of area Sc (figure 26). A sound source of constant power E1 is placed in room 1 of volume V1 . Let A1 be the absorption of room 1 excluding the common surface Sc and A 2 the absorption of room 2 except for the common surface Sc. The fraction of energy absorbed per second by the walls of 1 is :A1...