aud_07_present4

aud_07_present4 - X.A.2 Encoding sound frequency Encoding...

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Encoding Frequency in the peripheral auditory system Hair cells located in different places on the basilar membrane respond to different frequencies (pitches) of sound. Their responses to stimuli can be plotted as frequency tuning curves (FTC’s) Frequency tuning curves (FTCs) represent the frequency/intensity receptive field of auditory neurons. BW CF = 1 kHz At higher intensities, the neuron with the FTC to the left responds to a wider range of frequencies (or larger bandwidth) than at lower intensities. What do different locations on the cochlea correspond to? The cell is most sensitive to the “best” or “characteristic” frequency (CF) which is the lowest point on the FTC. Frequency (kHz) 0.1 1 10 Intensity (dB) Note your book uses the term threshold (for intensity threshold) on this axis Different frequencies of sound This continuous progression of best frequency creates a map of frequency on the basilar membrane. When an area has a map of frequency it is called _________. Tonotopic X.A.2 Encoding sound frequency
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X.B Mustached Bat Echolocation http://soma.npa.uiuc.edu/courses/physl490b/models/bat_echolocation/bat_echolocation.html
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aud_07_present4 - X.A.2 Encoding sound frequency Encoding...

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