The methods used in solving the problems related to the interpretation of frequency response curves of large rooms [M. R. Schroeder, J. Acoust. Soc. Am.29, 1258 (1957)] are employed for the computation of the principal parameters of spatial response curves in large rooms at fixed frequencies. The results for the rms response fluctuations and the mean level difference between maxima and minima are the same as for frequency response curves, namely 11 and 10 db, respectively. The mean spacing of adjacent maxima depends upon the dimensionality of the space, the wavelength, λ, and the isotropy of the sound field. The mean spacings are 0.50λ, 0.67λ, and 0.79λ for complete isotropy in one, two, and three dimensions, respectively.