Near-Threshold Auditory Evoked Fields and Potentials are In Line with the Weber-Fechner Law
According to the Weber-Fechner law, the relationship between sound pressure and perceived loudness should be logarithmic. However, psychoacoustic data do not support this law. Instead, it is widely accepted now that intensity and loudness are approximately related by a power law such that a doubling in loudness roughly requires a tenfold increase in intensity (Stevens 1955). The power law is not applicable at low intensities, though: Extrapolation of the function derived for higher intensities leads to a considerable overestimation of the loudness at threshold (see, e.g., the compilation of data in Buus et al. 1998).
KeywordsSound Pressure Response Amplitude Temporal Integration Wave Versus Brainstem Auditory Evoke Potential
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