"The ears of guinea pigs were stimulated with sine waves of frequencies between 5 and 60 ~ and intensities from 10 to 60 db above 1 bar. The electrical method was used to study the cochlear responses and nerve impulses from the round window. For the lower tones the waves of cochlear response were characteristically distorted; for the higher tones they were sinusoidal at low intensities and distorted at high intensities. The greatest intensities were sufficient to damage the ear. The functional relations between stimulus intensity and the magnitude of cochlear response were similar to those previously found for higher tones. Sensitivity was very low below 15 ~, but from that frequency upward was fairly uniform. The volleys of nerve impulses always bore a simple integral relation to the waves of cochlear response. The results are discussed in regard to the problems of the upper limit of loudness, the origin of subjective harmonics, and the lower limits of pitch perception." (PsycINFO Database Record (c) 2006 APA, all rights reserved)