Profile Analysis: Auditory Intensity Discrimination
This book brings together recent research on the ability of human listeners to discern changes in the shape of complex acoustic spectra. It systematically discusses issues surrounding the discrimination of a change in acoustic intensity and the physiological mechanisms responsible for this process. The book also proposes two new theories which attempt to explain spectral shape discrimination on the basis of more elementary auditory processes. The research described here is helping scientists gain a better understanding of auditory skills such as those involved in listening to music and speech.
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2 Intensity Discrimination
3 Discrimination of a Change in Intensity Level for Sinusoidal Signals
4 Some Properties of Profile Analysis
5 Frequency and Relative Level Effects in Profile Analysis
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AA/A abscissa absolute threshold acoustic AI/I amplitude assume auditory auditory system bandwidth basilar membrane change in intensity change in spectral channel comparison process complex condition correlation critical band cue band dard dB SPL decibels density detecting a change detection performance distribution duration energy equal estimate experiment experimental Feth fibers Figure firing rate fixed forced-choice frequency region function histogram increase increment intensity discrimination intensity level interstimulus interval level difference listening logarithmic masker band masking measured msec near-miss noise band number of components observers output overall level parameter perceptual constancy Poisson process ponents present profile analysis psychoacoustic psychometric function quency random random variable ratio relative signal band signal component signal frequency signal threshold simple simultaneous comparison single sinusoid sinusoidal signal sound spectral shape spectrum spikes standard deviation studies task theory threshold value tion tones variable variance-covariance matrix varied waveform waveshape Weber fraction Weber's law