PS_Sens_Masking - Frequency ranges for different organisms....

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1 Frequency ranges for different organisms.
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2 Auditory detection thresholds (audibility curves) for different species.
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3 Best thresholds for 8 th nerve fibers in the cat. The solid line is behavior detection data. The animal’s behavior approximately tracks the sensitivity of the population of high spontaneous 8 th nerve neurons.
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4 The audibility curve and equal loudness contours for humans. The region in gray shows the range of frequencies and intensities for typical speech. This is a particularly important range of stimuli to hear.
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5 Here are the frequencies and intensities associated with speech sounds. The consonants are less intense and higher in frequency (especially the fricatives).
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6 Hearing loss grows with age. Much of this loss is the cumulative effect of exposure to intense sound.
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7 Typical audiogram of an individual with a 50-db hearing loss. Notice that this level of loss is cutting into the region needed for speech perception.
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8 A cochlear implant is a device that can restore some hearing in most individuals
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This note was uploaded on 08/12/2008 for the course PSY 323P taught by Professor Geisler during the Spring '08 term at University of Texas.

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PS_Sens_Masking - Frequency ranges for different organisms....

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