1138 Definitions Flashcards
maximum displacement in either direction
amplitude
wave crosses axis moving toward crest
ascending nodes
measurement of sound intensity
bel
disturbances in a fluid or solid
sound
region of higher air pressure
compression
number of waves per second
frequency
disturbance in same direction as wave motion
longitudinal wave
wavelength
distance between relative points on separate waves
region of reduced air pressure
rarefaction
speed at which a disturbance travels through its medium
wave speed
wave crosses axis moving toward trough
descending node
Affects the speed of a wave
medium
change in the direction as a wave passes into a new medium
refraction
an abrupt change in the direction of a wave
reflection
loud compression wave generated by an object traveling at the speed of sound or faster
sonic boom
the study of sound and its control in enclosed areas
acoustics
a room in which sound is reflected and concentrated at a second location
whispering gallery
a wave caused by an earthquake
seismic waves
an instrument that measures distances to underwater obstacles
sonar
the speed of sound
sound barrier
A phenomenon in which waves from an approaching or receding source seem to change in frequency for an observer
Doppler effect
A periodic, back-and-forth, twisting motion about a central axis is called a _________
torsional wave
The alternate rising and falling of amplitude due to interference
beats
waves produced by two wave trains of the same frequency traveling in opposite directions
standing waves
points at the center of the loops of a standing wave where the amplitude is greatest
antinodes
the single wave that has the properties of two or more individual waves
resultant
make music by a vibrating air column in a pipe
wind instruments
separating a complex wave motion into a series of simple sine waves
Fourier analysis
sound made of so many different frequencies that no discernible pattern can be recognized
noise
make music by bowing, plucking, or striking strings
stringed instruments
sections between consecutive nodes
loops
sound with a discernible pattern that repeats
music
