Loudspeaker systems do not radiate uniformly at all angles because of cabinet diffraction, directivity effects and driver interference near crossover frequencies. In order to assess the practical importance of these effects, and to determine the -frequency response- of typical room/loudspeaker combinations, measurements were made of the spectral balance at normal listener positions in 10 rooms used for music reproduction, using 1/3-octave pink noise. Results are compared with predicted and measured spectral balance in concert halls.
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