Abstract
The cochlear microphonic potential (CM) and summating potential (SP) response, recorded at locations beyond the point of maximum frequency response and elicited by high intensity elementary acoustical signals with Δ fΔ f= f 0 f 0= 1 2 , (where Δ f is signal bandwidth, Δ t is signal duration, f 0 is signal midfrequency, t 0 is signal midperiod), are of similar shape and duration even when the stimulus dimensions are changed in a compensated way, thus exhibiting a constant response to constant informational relations. The constant CM and SP temporal response indicates that at locations beyond the point of maximum frequency response, a hydrodynamic wavelength-intensity trade in cochlear fluid movement occurs. In amplitude, the negative SP response is spatially distributed with respect to the components of the applied signal. The results of this study provide support for a model of cochlear functioning based on cochlear hydrodynamics and the two hair cell systems of the cochlea.
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