Chapter 9 Opener Figure - PowerPoint Presentation

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Chapter 9 Opener

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Figure

9.1 The

pattern of pressure fluctuations of a sound

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Figure 9.1 The pattern of pressure fluctuations of a sound

(Part 1)

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Figure 9.1 The pattern of pressure fluctuations of a sound (Part

2)

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Figure

9.2 Amplitude

and frequency

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Figure 9.2 Amplitude and

frequency (Part 1)

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Figure 9.2 Amplitude and frequency (Part

2)

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Figure 9.2 Amplitude and frequency (Part

3)

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Figure 9.3 Humans can hear frequencies that range from about 20 to 20,000 Hz

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Table 9.1 Decibel levels that correspond to different sound pressure ratios

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Figure 9.4 Sounds that we hear in our daily environments vary greatly in

intensity

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Figure 9.5 A spectrum displays the amplitude for each frequency present in a sound wave

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Figure 9.5 A spectrum displays the amplitude for each frequency present in a sound

wave (Part 1)

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Figure 9.5 A spectrum displays the amplitude for each frequency present in a sound wave (Part

2)

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Figure 9.6 Harmonic sounds with the same fundamental frequency

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Figure 9.7 The size and shape of pinnae vary greatly among

mammals

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Figure 9.8 Structures of the human ear

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Figure 9.8 Structures of the human

ear (Part 1)

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Figure 9.8 Structures of the human ear (Part

2)

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Figure 9.8 Structures of the human ear (Part

3)

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Figure 9.9 The cochlea

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Figure 9.9 The

cochlea (Part 1)

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Figure 9.9 The cochlea (Part

2)

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Figure 9.9 The cochlea (Part

3)

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Figure 9.9 The cochlea (Part

4)

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Figure 9.9 The cochlea (Part

5)

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Figure 9.10 Vibration causes a displacement along the cochlear partition

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Figure 9.11 Stereocilia

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Figure 9.11

Stereocilia (Part 1)

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Figure 9.11 Stereocilia (Part

2)

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Figure 9.11 Stereocilia (Part

3)

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Figure 9.12 The cochlea is like an acoustic prism

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Figure 9.12 The cochlea is like an acoustic

prism (Part 1)

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Figure 9.12 The cochlea is like an acoustic prism (Part

2)

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Figure 9.13 Threshold tuning curves for six auditory nerve fibers

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Figure 9.14 Outer hair cells

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Figure 9.15 Two-tone suppression

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Figure 9.16

Isointensity

functions for one AN fiber with a characteristic frequency of 2000 Hz

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Figure 9.17 Firing rate plotted against sound intensity for six auditory nerve fibers

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Figure 9.18 Phase locking

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Figure 9.19 The volley principle

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Figure 9.20 Pathways in the auditory system

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Figure 9.21 The first stages of auditory processing begin in the temporal lobe in areas within the

Sylvian

fissure

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Figure 9.22

The

threshold for hearing sounds at varying frequencies

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Figure 9.23 The hearing of a manatee

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Figure 9.23 The hearing of a

manatee (Part 1)

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Figure 9.23 The hearing of a manatee (Part

2)

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Figure 9.23 The hearing of a manatee (Part

3)

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Figure 9.24 Critical bandwidth and masking

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Figure 9.24 Critical bandwidth and

masking (Part 1)

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Figure 9.24 Critical bandwidth and masking (Part

2)

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Figure 9.25 Environmental noise affects hearing

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Figure 9.25 Environmental noise affects

hearing (Part 1)

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Figure 9.25 Environmental noise affects hearing (Part

2)

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Figure 9.26 When hearing thresholds are increased by impairment, a sound must have more energy to be heard, but loudness increases faster than it does with healthy ears

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Figure 9.27 Following exposure to loud sounds, listeners can have difficulty using sounds even when hair cells appear to be undamaged

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Figure 9.28 Cochlear implants

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Figure 9.28 Cochlear

implants (Part 1)

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Figure 9.28 Cochlear implants (Part

2)