The acoustic response of a semireverberant enclosure with two interacting, velocity prescribed source distributions was analyzed using standard modal analysis techniques with a view towards a better understanding of active noise control. Different source and enclosure dimensions, source separations, and single wall admittances were studied over representative bandwidths of 10 Hz, and between 40 and 300 Hz, with source relative phase as a parameter. Results indicate that power radiated into the enclosure correlates with the spatial average of the mean‐square pressure even though the reverberant field is nondiffuse. Power reductions can therefore be used to estimate global noise reduction in a nondiffuse semireverberant environment. Parametric studies indicate that maximum power reductions of up to 25 dB can be achieved when secondary and primary sources are compact and closely spaced, as might be expected. Although there is less reduction with increasing frequency and source separation or size, significant reductions of up to 8 dB still occur over 1‐ or 2‐Hz bandwidths.