Data is needed on the distribution of peak energy in music in order to design preemphasis on the basis of equal probability of overload at all frequencies. Previously published data is discussed, and new data is presented and discussed. The data show that energy distribution is very variable; the energy may be within plus or minus 3 db from 40 c to 16 kc; or the energy may be down as much as 30 db at 40 c and 6 kc.
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