The circuit provides adaptation of the signal of a multiple channel room noise generator constructed for loud speaker output. The signal is adapted to the special acoustic data of a multiple channel room noise head phone.The room noise generator (1) provides at least the left and right sound signals for a frontal acoustic irradiation and at least one room noise tone signal. A delay pattern with at least a first reflection is impressed on these signals. The circuit has at least two sound convertors per right and left head phone capsule. One is mainly supplied with the right and left sound signals and the other is mainly supplied with the room noise signal. A delay member delays the room noise signal relative to the right and left signals. The delay has a constant such that a total relative delay of 40 to 110 ms for the first reflection results.
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