Exam 1 Part 4

Question 1

Distance traveled by the waveform

Answer 1

Wavelength

Question 2

What is the formula for wavelength?

Answer 2

Speed of sound / frequency

Question 3

A pure tone only have ___ frequency

Answer 3

1

Question 4

A complex sound has ____ frequencies

Answer 4

Multiple

Question 5

What makes up a complex waveform?

Answer 5

Individual frequencies

Question 6

The higher the frequency the more ____ there are

Answer 6

Cycles

Question 7

Sound generated by a vibrating source

Answer 7

Incident wave

Question 8

How do incident waves interact with the environment?

Answer 8

Absorption, reflection, refraction, diffraction

Question 9

Dampening of a sound wave

Answer 9

Absorption

Question 10

What is an example of absorbing a sound wave?

Answer 10

Auditorium, covering your mouth while speaking

Question 11

Refers to sound reflecting or bouncing off a surface

Answer 11

Reflection

Question 12

What is an example of reflecting a sound wave?

Answer 12

While telling a secret, you put a hand to the mouth

Question 13

Refers to a change of direction due to local difference of air temperature

Answer 13

Refraction

Question 14

What is an example of refracting a sound wave?

Answer 14

Sound speeds up as it encounters warmer air and is refracted downward

Question 15

Refers to the change of direction as it pass through or around an object.

Answer 15

Diffraction

Question 16

What is an example of diffracting a sound wave?

Answer 16

Sound made behind a half-wall can still be heard on the other side

Question 17

Humans’ perceptual range of hearing is around ___ to ___ Hz.

Answer 17

20 - 20,000 Hz

Question 18

Frequencies below a human’s perceptual range

Answer 18

Subsonic

Question 19

Frequencies above a human’s perceptual range

Answer 19

Supersonic

Question 20

Waves combine and decrease the resultant amplitude

Answer 20

Destructive interference

Question 21

Waves combine and increase the resultant amplitude

Answer 21

Constructive interference

Question 22

Something that has ____ amplitude is difficult to hear in noisy situations

Answer 22

Low

Question 23

Rate at which an object vibrates; based on the production of the speaker

Answer 23

Frequency

Question 24

An individual’s perception of the sound’s location on a musical scale; based on perception of the listener

Answer 24

Pitch

Question 25

True or false: frequency and pitch are related and they are the same

Answer 25

False; they're related but not the same

Question 26

How the speaker is producing the sound source

Answer 26

Acoustic pitch

Question 27

Distance that air molecules are displaced (pascals); measurement of the pressure changes in the air as sound propagates through it

Answer 27

Amplitude

Question 28

Power per unit of area; the amount of power required to generate a certain output

Answer 28

Intensity

Question 29

Amplitude and intensity share a _____ relationship

Answer 29

Logarithmic

Question 30

Intensity = ___

Answer 30

Amplitude ^2