7.1 Acoustic Cues and Signals
1.
Which of the following is an example of an auditory signal?
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A bird’s song.
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Water splashing in a creek.
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Wind blowing through the leaves of a tree.
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The buzz of a mosquito’s wings.
2
.
Why is the sense of hearing especially valuable for communication?
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Because sound is only detected at short distances.
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Because sound can travel long distances and around obstacles.
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Because hearing is more reliable than other senses.
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Because only sound can carry information about the identity of individuals.
3.
What does the frequency of an acoustic wave measure?
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How fast air molecules are displaced.
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How much the air pressure changes between compression and rarefaction.
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How rapidly the air pressure changes between compression and rarefaction.
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How often an animal produces a sound over the course of a day.
4
.
The perception of pitch is primarily related to:
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the amplitude of a sound.
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the frequency of a sound.
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whether the sound is periodic or aperiodic.
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the phase of the sound.
5.
The ability of sound waves to travel around solid objects is known as:
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reverberation.
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diffraction.
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resonance.
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interference.
7.2 How Does Acoustic Information Enter the Brain?
6
.
Which middle ear bone is connected to the tympanic membrane?
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The malleus
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The incus
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The stapes
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The tensor tympani
7.
Which part of the ear separates complex sounds into component frequencies?
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The Organ of Corti
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The basilar membrane
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The scala vestibuli
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The tectorial membrane
8
.
What is the function of the inner hair cells in the cochlea?
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To convert the physical energy of acoustic waves into neural signals.
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To protect the cochlea from overstimulation.
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To amplify low-intensity sounds.
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To regulate the pressure within the cochlea.
9.
Which of the following is a common cause of conductive hearing loss?
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Damage to stereocilia by high-intensity sounds
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Damage to the auditory nerve
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Death of hair cells from ototoxic antibiotics
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Infection of the middle ear
10
.
All of the axons in the auditory nerve form synapses in the:
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medial superior olive.
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cochlear nucleus.
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inferior colliculus.
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spiral ganglion.
11.
Which region in the auditory pathway only receives input from the contralateral ear?
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The cochlear nucleus
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The lateral superior olive
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The medial geniculate body
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None of the above
12
.
Which brain region is involved in comparing the relative timing of sounds between the two ears?
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The lateral superior olive
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The nucleus of the trapezoid body
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The medial superior olive
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The inferior colliculus
13.
What is the role of the medial geniculate body in the ascending auditory pathway?
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It is the primary gateway for auditory information to reach the cortex.
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It forms synapses with the outer hair cells of the cochlea.
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It determines the location of sound sources using differences in timing and level of stimuli.
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It integrates auditory, visual, and somatosensory input to create a unified map of space relative to head location.
14
.
A tonotopic organization of auditory information is found in:
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the cochlea.
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the cochlear nucleus.
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the primary auditory cortex.
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All of the above
7.3 How Does the Brain Process Acoustic Information?
15.
The azimuth of a sound source refers to:
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the elevation of a sound source.
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the angle left or right on a horizontal plane.
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the distance of a sound source.
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the perceptual contents of a sound source.
16
.
What are interaural timing and level differences used to determine?
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The elevation of a sound source
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The azimuth of a sound source
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The distance of a sound source
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The perceptual contents of a sound source
17.
What is the function of a coincidence detector in the auditory system?
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To determine the distance of a sound source.
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To compare the timing difference between inputs from the two ears.
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To compare the difference in level of inputs from the two ears.
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To identify whether a sound source is periodic or aperiodic.
18
.
Memories of complex sounds are thought to be stored in:
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the inferior colliculus.
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the medial geniculate body.
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the hippocampus.
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the auditory cortex.
19.
A group of speech sounds that can be used interchangeably is called a:
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phoneme.
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lexeme.
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phone.
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syllable.
20
.
What change occurs in phonetic perception between the ages of 6 months and 9-12 months in human infants?
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Infants learn to discriminate between all phonemes regardless of their native language.
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Infants become better at discriminating phonemes in the language of their parents or caregivers and worse at discriminating phonemes not found in that language.
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They lose the ability to distinguish phonemes.
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They start speaking in their native language.
7.4 Balance: A Sense of Where You Are
21.
Which structure within the vestibular system is responsible for sensing the dynamic forces created by angular movements?
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The cochlea
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The semicircular canals and ampullae
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The utricle and saccule
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The otoliths
22
.
The utricle and saccule are primarily responsible for sensing:
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linear movements and the direction of gravity.
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pitch and roll.
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the low frequencies in sound waves.
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static pressure differences in the middle ear.
23.
Ascending axons from the vestibular ganglion form synapses in the:
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cerebellum.
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oculomotor nucleus.
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medial superior olive.
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vestibular nuclear complex.
24
.
Which of the following is a characteristic of vestibular reflexes?
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They are among the slowest in the body.
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They are among the fastest in the body.
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They are complex and involve a large number of synapses.
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They are only found in primitive mammals.