Sound Flashcards
Transverse wave
a wave vibrating at right angles to the direction the wave is traveling
Trough
The lowest point of the wave
Wavelength
Distance from top of the crest to the top of the next one
Crest
High point of a wave
Out of phase
The overlapping of two waves such that the crest of one is aligned with the eh trough of another
Doppler effect
The change in pitch heard when an object is emitting a sound and moving moving toward or away from the listener
How are constructive and destructive interference similar and different ?
Similar : both lead to change in amplitude
Different : constructive interference has a increase in amplitude
Destructive interference amplitude cancels out
In phase
Occurs when two waves overlap
What is the range of human hearing ?
20-20,000
Amplitude
Height of the wave from zero
Resonance
Occurs when the frequency of a force vibration matches the natural frequency of the body
Compression
When they come together
Rarefaction
When it spreads out less force
What’s is the unit for frequency
Hertz
What is the units for wavelength
Cm/ s m/s
What is the unit fors for period
Seconds
What is the untie for velocity
Meters
What media can sound move through the fastest
A solid
What media can sound move after the fastest media ?
Liquid
What media can sound move through the slowest
Gas
What media can sound out move through and why
A vacuum , a space where there is no air . Can not be transmitted bc there is no air .
Similarities / difference between a transverse wave and a longitudinal wave ?
Similar
Difference:direction the medium of the wave moves
Longitudinal- the motion of the medium is parallel to the direction of the wave . This means that the particles move left and right
Transverse the motion of the medium is a right angles to the direction of the wave.
Constructive interference
When the a crest of one waves overlaps a crest of another wave to produce a wave of increase of amplitude
Destructive wave
A combination of waves here crests of one overlaps the trough of another causing the wave To have a decrease in amplitude
Nodes(standing wave )
Any part of a standing wave that remains stationary
Antinodes (standing wave)
The position on a standing wave where the largest amplitudes occurs
Ultra sonic
To high for you to hear
Intra sonic
To low for you to hear
The difference in size and mass between and mass between instruments
Frequency increases – pitch decreases
High pitch — high frequency
Higher the mass — lower the pitch
Shorter the air column —higher the pitch
Lower pitch — low frequency
Stadium wave
A pulse that moves through the crowd at sporting events
Shock wave
A cone shaped wave produced by an object moving at supersonic speed through a fluid
Ear canal
Part of the outer ear that leads to the ear drum
Semi circular
Consists of three fluid filled tubes at 90 degrees and 45 distress horizontal
Cochlea
Snail shaped organ that’s responsible for detecting the pitch of a particular sound
Sound
A longitudinal and compressional wave
Frequency
The number of cycles per second that a sound makes .
Period
Amount of time per cycle
Natural frequency
The standard frequency at which an object vibrates when struck, plucked, bowed or blown into
Refraction
Change in speed of wave when it
Moves from one medium to another
Medium
A substance that carries a wave from one location to another
What happen to Tacoma narrows bridge in 1940 at Washington ?
It was destroyed by a 40 mph wind. The wind produced a forced that resonated with natural frequency of the bridge . The amplitudes for higher and higher over several hours and collapsed
Beats
Sounds produced when two waves slightly different frequency are played at the same time
Pinna
Receives sound from the ear
Forced vibration
Vibration of an object that is made to vibrate by another vibration object nearby
Sonic boom
The sharp crack heard when the shock wave that sweeps begin a super sonic aircraft reaches the listener
Wiggle in time and space
Wave
