Abstract: The invention relates to a method and device for active sound damping in a closed interior space (1) having an external wall which comprises at least one wall section (3, 4) with a primary sound source (6) which emits a primary sound signal induced by an interference signal (5), with at least one secondary sound generator (7; 12) in the interior space for generating a secondary sound signal, at least one sound pick-up device (10) in the interior space for detecting a sound signal in the interior space and a control device (8) which is connected to the at least one secondary sound generator (7; 12) and to the at least one sound pick-up device (10) and which controls the at least one secondary sound generator in dependence on the output signal of the at least one sound pick-up device so that the secondary sound signal is positioned substantially complementary to the primary sound signal.