G. R. Price [J. Acoust. Soc. Amer. 51, 2059–2061 (1972)] has stated that “the approximately constant relationship of cochlear microphonic output to stapes velocity noted by Weiss, Peake, and Sohmer [J. Acoust. Soc. Amer. 50, 602–615 (1971)] is probably a function of a bias introduced by the choice of electrode location, i.e., the bone near the round window.” He also argues that “the most appropriate recording site would seem to be [on] the round window.” We have measured cochlear potential responses to tones as a function of frequency with wire electrodes simultaneously on the round‐window membrane (ERW) and on the ventral surface of the petrous bone near the round window (EG). The ratio of the magnitude of these potentials, ∣ERW/EG∣, is constant (within ±2 dB) for frequencies between 400 and 20 000 Hz and depends upon frequency below 400 Hz. These results, together with those of Weiss et al., lead to the conclusion that ∣ERW/ẊS∣ is approximately constant between 400 and 10 000 Hz, where ẊS is the stapes velocity. Comparison of our measurements of ERW, with those of Price [J. Acoust. Soc. Amer. 49, 1899–1901 (1971)] reveals that the greatest differences lie in the range of frequencies between 5 and 20 kHz. The magnitude of the difference increases with frequency and is approximately 20 dB at 20 kHz. Analysis of the methods used to measure sound pressure at the tympanic membrane in these two studies indicates that the differences might result in large part from inaccuracies Price's measurements of sound pressure.