Tonotopic cortical representation of periodic complex sounds
نویسندگان
چکیده
منابع مشابه
Tonotopic cortical representation of periodic complex sounds.
Most of the sounds that are biologically relevant are complex periodic sounds, i.e., they are made up of harmonics, whose frequencies are integer multiples of a fundamental frequency (Fo). The Fo of a complex sound can be varied by modifying its periodicity frequency; these variations are perceived as the pitch of the voice or as the note of a musical instrument. The center frequency (CF) of pe...
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Work on the functional organization of auditory cortex in nonhuman primates has recently gained increasing attention. Neurophysiological studies using complex stimuli, combined with anatomical tract tracing, reveal a hierarchy of cortical processing comparable to other sensory systems. On the basis of these findings from animal studies, together with the advent of modern neuroimaging methods us...
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For the problem of separating sound mixtures, periodicity is a powerful cue used by both human listeners and automatic systems. Short-term autocorrelation of subband envelopes, as in the correlogram, accounts for much perceptual data. We present a discrete representation of common-period sounds, derived from the correlogram, for use in computational auditory scene analysis: The weft describes a...
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The ability to extract a pitch from complex harmonic sounds, such as human speech, animal vocalizations, and musical instruments, is a fundamental attribute of hearing. Some theories of pitch rely on the frequency-to-place mapping, or tonotopy, in the inner ear (cochlea), but most current models are based solely on the relative timing of spikes in the auditory nerve. So far, it has proved to be...
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How the brain processes complex sounds, like voices or musical instrument sounds, is currently not well understood. The features comprising the acoustic profiles of such sounds are thought to be represented by neurons responding to increasing degrees of complexity throughout auditory cortex, with complete auditory "objects" encoded by neurons (or small networks of neurons) in anterior superior ...
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ژورنال
عنوان ژورنال: Human Brain Mapping
سال: 2003
ISSN: 1065-9471,1097-0193
DOI: 10.1002/hbm.10132