1138 Definitions

Question 1

maximum displacement in either direction

Answer 1

amplitude

Question 2

wave crosses axis moving toward crest

Answer 2

ascending nodes

Question 3

measurement of sound intensity

Answer 3

bel

Question 4

disturbances in a fluid or solid

Answer 4

sound

Question 5

region of higher air pressure

Answer 5

compression

Question 6

number of waves per second

Answer 6

frequency

Question 7

disturbance in same direction as wave motion

Answer 7

longitudinal wave

Question 8

wavelength

Answer 8

distance between relative points on separate waves

Question 9

region of reduced air pressure

Answer 9

rarefaction

Question 10

speed at which a disturbance travels through its medium

Answer 10

wave speed

Question 11

wave crosses axis moving toward trough

Answer 11

descending node

Question 12

Affects the speed of a wave

Answer 12

medium

Question 13

change in the direction as a wave passes into a new medium

Answer 13

refraction

Question 14

an abrupt change in the direction of a wave

Answer 14

reflection

Question 15

loud compression wave generated by an object traveling at the speed of sound or faster

Answer 15

sonic boom

Question 16

the study of sound and its control in enclosed areas

Answer 16

acoustics

Question 17

a room in which sound is reflected and concentrated at a second location

Answer 17

whispering gallery

Question 18

a wave caused by an earthquake

Answer 18

seismic waves

Question 19

an instrument that measures distances to underwater obstacles

Answer 19

sonar

Question 20

the speed of sound

Answer 20

sound barrier

Question 21

A phenomenon in which waves from an approaching or receding source seem to change in frequency for an observer

Answer 21

Doppler effect

Question 22

A periodic, back-and-forth, twisting motion about a central axis is called a _________

Answer 22

torsional wave

Question 23

The alternate rising and falling of amplitude due to interference

Answer 23

beats

Question 24

waves produced by two wave trains of the same frequency traveling in opposite directions

Answer 24

standing waves

Question 25

points at the center of the loops of a standing wave where the amplitude is greatest

Answer 25

antinodes

Question 26

the single wave that has the properties of two or more individual waves

Answer 26

resultant

Question 27

make music by a vibrating air column in a pipe

Answer 27

wind instruments

Question 28

separating a complex wave motion into a series of simple sine waves

Answer 28

Fourier analysis

Question 29

sound made of so many different frequencies that no discernible pattern can be recognized

Answer 29

noise

Question 30

make music by bowing, plucking, or striking strings

Answer 30

stringed instruments

Question 31

sections between consecutive nodes

Answer 31

loops

Question 32

sound with a discernible pattern that repeats

Answer 32

music