Sound Vocabulary
Back and forth vibratory motion is?
simple harmonic motion
Sine curve is?
a curve whose shape represents the crests and troughs of a wave.
longitudinal wave is?
a wave where the vibration/disturbance is in the same direction as the wave is travelling (parallel)
wave in which part of the wave remain stationary and the wave appears not to be travelling. produced by interference between an incident and reflected wave is?
standing wave
diffraction is?
the bending of a wave around a barrier
wavelength is?
distance from the top of one crest to the top of the next one, measured in meters (or any other unit of distance)
The high point on a wave as represented by a sine curve is?
crest
A pattern formed by the overlapping of two or more waves that arrive in the same region at the same time is?
interference pattern
The part of a standing wave that remains stationary is?
nodes
Disturbance is?
The pattern of a wave going through the medium
period-frequency relationship is?
frequency = 1/period OR period = 1/frequency
Trough is?
The low point on a wave as represented by a sine curve
Term to describe two waves that are destructively interfering is?
out of phase
The points on a standing wave where the maximum amplitude occurs is?
antinodes
Velocity=wavelength times frequency is?
Frequency-wave length equation
wave speed is?
distance is wavelength, period is time; wave speed = wavelength divided by period, substitute 1/frequency for period, and equation becomes: wave speed = wavelength times frequency
Midpoint of vibration is?
The home position, represented by a straight dashed line
in phase is?
Term to describe two waves that are constructively interfering
Increase in the measured frequency of light (doppler effect), occurs when receiver and source of light move toward one another is?
blue shift
What type of waves are sound waves?
They are longitudinal and mechanical (meaning they have to move through some sort of median)
infrasonic is?
sound waves with frequencies below 20 Hz
Distance from the midpoint to the crest/trough, measured in meters (or any other unit of distance) is?
Amplitude
refraction is?
the bending of a wave because of a change in wave speed due to a change in medium
Decrease in the measured frequency of light (doppler effect), occurs when receiver and source of light move away from one another is?
red shift
In what direction do sound waves travel when a vibration creates a noise?
It moves in all directions