Quiz #11

Question 1

A sound stimulus occurs when the movements or vibrations of an object cause __ in air, water, or any other elastic medium that can transmit vibrations.

a.
temperature changes

b.
amplitude variations

c.
pressure changes

d.
air quality changes

Answer 1

c.
pressure changes

Question 2

When the diaphragm of a speaker moves out, it pushes the surrounding air molecules together, a process known as __; when the diaphragm of the speaker moves back in, air molecules spread out to fill the extra space created, a process known as __.

a.
a sound trough; a sound wave

b.
condensation; rarefaction

c.
rarefaction; condensation

d.
a sound wave; a sound trough

Answer 2

b.
condensation; rarefaction

Question 3

The unit of measurement for sound wave frequency is __.

a.
degrees

b.
Hertz

c.
decibels

d.
bels

Answer 3

b.
Hertz

Question 4

A complex tone can be created by starting with a pure tone, called the __, and adding frequencies that are multiples of this first frequency.

a.
audible frequency

b.
harmonic frequency

c.
fundamental frequency

d.
spatial frequency

Answer 4

c.
fundamental frequency

Question 5

What is the order of the ossicles in the middle ear?

a.
malleus, stapes, incus

b.
incus, malleus, stapes

c.
malleus, incus, stapes

d.
incus, stapes, malleus

Answer 5

c.
malleus, incus, stapes

Question 6

The range of human hearing is between about __ Hz.

a.
20 and 20,000

b.
10 and 200

c.
20 and 50,000

d.
10 and 2,000

Answer 6

a.
20 and 20,000

Question 7

When listening to music, which of the following methods will help ensure that you hear all of the frequencies represented in the piece?

a.
Turn the volume down (e.g., 20 dB) so the music is quiet.

b.
Play white noise in the background to allow better discrimination of sounds.

c.
Turn the volume up (e.g., 80 dB) so the music is loud.

d.
Hold volume constant at all frequencies of the piece.

Answer 7

c.
Turn the volume up (e.g., 80 dB) so the music is loud.

Question 8

Sound pressure changes cause the cilia of the hair cells to bend in one direction, causing __ to stretch which opens ion channels in the membrane of the cilia. When the ion channels open, positively charges __ ions flow into the cell and ultimately result in the initiation of a neural signal.

a.
the basilar membrane; calcium

b.
tip links; potassium

c.
a traveling wave; magnesium

d.
the tectorial membrane; sodium

Answer 8

b.
tip links; potassium

Question 9

A human tonotopic map shows that a receptor close to the apex will respond best to a tone of __ Hz.

a.
800

b.
7,000

c.
50

d.
30,000

Answer 9

c.
50

Question 10

Hearing loss that occurs as a function of age is called __.

a.
presbyopia

b.
anosmia

c.
presbycusis

d.
aural ataxia

Answer 10

c.
presbycusis