[Sound pressure isopotential levels for the microphonic potential of the internal ear]

The amplitude of gross microphonic potential of guinea pigs was used for output regulation of the generator of sinusoidal and narrow-band noise signals at continuous changing of frequencies. Thus isopotential contours of sound pressure levels (SPL) were obtained. The dynamics of the isopotential SPL on different levels within the range of 50-20 000 Hz, is described.