. Elements of acoustical engineering. Electro-acoustics; Sound. FREQUENCY 1000 CYCLES PEB SEC6ND 10000. 0 1000 10000 100000 VOLUME IN CUBIC FEET Fig. Lower graph shows the optimum reverberation time for a theatre as a function of the volume for 1000 cycles. Upper graph shows the relation between the reverberation time and the frequency, that is, the reverberation time at other frequencies is obtained by multiplying by K. frequency of 1000 cycles, is shown in the lower graph of Fig. The reverberation time for other frequencies can be obtained by multiplying by the factor K, obtained
. Elements of acoustical engineering. Electro-acoustics; Sound. FREQUENCY 1000 CYCLES PEB SEC6ND 10000. 0 1000 10000 100000 VOLUME IN CUBIC FEET Fig. Lower graph shows the optimum reverberation time for a theatre as a function of the volume for 1000 cycles. Upper graph shows the relation between the reverberation time and the frequency, that is, the reverberation time at other frequencies is obtained by multiplying by K. frequency of 1000 cycles, is shown in the lower graph of Fig. The reverberation time for other frequencies can be obtained by multiplying by the factor K, obtained from the upper graph of Fig. The reverbera- tion time increases at the lower and higher frequencies so that the aural rate of decay of pure tones will be approximately the same for all frequen- cies. See Sees. and and Figs. and E. Power Requirements for Reproducing Systems ^^. — The power require- 13 Olson, H. F., RCA Review, Vol. 1, No. 1, p. 49, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Olson, Harry Ferdinand, 1901-. New York, D. Van Nostrand company, inc.
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