Module 1

Question 1

As an object vibrates it bumps into the air particles around it. These particles then bump into the particles next to them, and so on and so on. This moving of particles back and forth creates areas of particles that are close to one another known as?

Answer 1

compression

Question 2

As an object vibrates it bumps into the air particles around it. These particles then bump into the particles next to them, and so on and so on. This moving of particles back and forth creates areas of particles that are farther apart from one another known as?

Answer 2

rarefaction

Question 3

______ is the number of cycles of vibration completed per second.

a) pitch
b) frequency
c) amplitude
d) phase

Answer 3

b) frequency

Question 4

We perceive high/low frequencies as high/low ____ sounds.

a) pitch
b) frequency
c) amplitude
d) phase

Answer 4

a) pitch

Question 5

Frequency is measured in units called?

Answer 5

hertz

Question 6

_____ refers to the size or magnitude of a sound wave

a) pitch
b) frequency
c) amplitude
d) phase
e) loudness

Answer 6

c) amplitude

Question 7

*_______is the psychological correlate of amplitude

a) pitch
b) frequency
c) amplitude
d) phase
e) loudness

Answer 7

e)loudness

Question 8

Sound Definition:There are 3 things that must occur : explain

Answer 8

1. Frequency and amplitude of the objects vibration must be within a range that is audible to the listener.
2. A substance for the sound to travel through
3. a listener

Question 9

Compression = increase/decrease in pressure?

Answer 9

increase

Question 10

RAREFACTION= increase/decrease in pressure?

Answer 10

decrease

Question 11

Sounds that have ONLY ONE FREQUENCY=?

Answer 11

pure tones

Question 12

Humans have sensitivity to sound over a broad range of sound frequencies –what is that frequency rage?

Answer 12

20 Hz-20,000 HZ)

Question 13

-Hearing sensitivity is best between ?

Answer 13

2,000 HZ to 5,000 Hz

Question 14

-Hearing sensitivity is POOR below ?

Answer 14

100 Hz and above 10,000 HZ

Question 15

-Loudness range of human hearing in decibles: is what?

Answer 15

100 dB from threshold

or the softest sound a person is able to hear, to the level that most people find uncomfortably loud. This is called the dynamic range

Question 16

The range of the softest sound someone can hear to the level of sound that is unbearable.
is known as?

Answer 16

dynamic range

Question 17

have multiple frequencies and the pattern REPEATS itself over time.

Answer 17

Periodic Complex waves

Question 18

have multiple frequencies BUT the pattern DOES NOT REPEAT itself.

Answer 18

Aperiodic complex wave:

Question 19

indicates a particular point in a wave cycle. It’s expressed in degrees.

Answer 19

phase

Question 20

When the start of two waves are exactly in phase or 0 degrees out of phase—the amplitude of the combined wave is twice the amplitude of the original waves.
This is known as?

Answer 20

Reinforcement

Question 21

When the start of two waves are 180 degree out of phase. The amplitude of the combined wave is 0.
This is known as?

Answer 21

cancellation

Question 22

The peripheral auditory system consists of the

Answer 22

outer ear, the middle ear, and the inner ear.

Question 23

the outer ear= comprised of the ?

Answer 23

pinna and ear canal

Question 24

the middle ear= comprised of the

Answer 24

tympanic membrane, the ossicles, the middle ear muscles, the middle ear space, and the Eustachian tube

Question 25

What happens when we hear sound? The outer ear gathers sound information and funnels it into the middle ear. The tympanic membrane transduces (AKA-converts energy) the pressure waves in air to mechanical vibrations. The mechanical vibrations are transmitted through the ossicles to the cochlea. The cochlea is filled with fluid. The mechanical vibration of the stapes footplate moves in the oval window of the cochlea, pressure waves are created in the fluid of the cochleae. These pressure waves travel down the length of the cochlea, where outer hair cells further amplify the sounds and the inner hair cells code sound by frequency and amplitude, sending signals to the brain via the auditory nerve.

Answer 25

know

Question 26

The middle ear amplifies sound by___decibels on its way to the cochlea

Answer 26

33