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40 Cards in this Set

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  • Back
Sound is a ______ that travels through a _____ as a ______ wave.
disturbance
medium
longitudinal wave
How are sounds made?
vibrations from whatever making the sound create the disturbance, which then pushes the molecules , when molecules move forward, it creates a rarefaction.
Which part of the body produces sound?
Larynx
Sound travels faster through solid or gas?
solid
What is diffraction?
when sound waves spread out after going through an opening or around a corner
The ability of material to bounce back is called what?
elasticity
Is more or less elasticity needed for good sound?
More
What is density?
how much matter or mass is in a given amount of space
In a materials of the same state of matter, particles do or don't move as quickly in a more DENSE MATERIAL?
DO NOT
Temperatures that are higher ___ ___ the particles in a medium?
speed up
Sound travels faster in ______ mediums than ____ ones.
warmer
cooler
The amount of energy that the wave carries is called ____ and is measured in _____?
intensity
watts per sq. meter
What you acutally hear is called ____ and is measured in _____.
loudness
decibels
What is ultrasound?
sounds above 20,000Hz, in audible to human
What is infrasound?
sounds below 20Hz, inaudible to humans
Pitch depends on what?
frequency, the higher the frequencey the higher the pitch
When the frequency of the sound waves match the natural frequency of the medium, they can add together and amplitude increases is an explanation of what?
RESONANCE
The apparent change in frequency as a wave source moves in RELATION TO THE LISTENER is called what?
DOPPLER EFFECT
The blending of fundamental tone and overtones are called what?
timbre
Insturments that use a string which vibrates when plucked, struck or rubbed with a bow is called?
stringed instrument
Brass and Woodwinds are instruments that have a _______ to create vibrations.
mouthpiece
The players' _____ make vibrations on brass instruments?
mouths
A vibrating reed creates sound for ___________.
woodwinds
Percussions make sounds when _____.
struck
When compositions and tones seem to have no musical relationship, it is called
dissonance
Interference is when what happens?
when two or more sound waves interact
Acoustics happen when two or more sound waves do what?
interact in specific room or hall
Repeated change in loudness is called ____?
beats
When 2 sounds are close in frequency that can do what?
be both constructive and destructive.
The EAR CANAL does what?
funnels wa es into the ear toward the eardrum
The Middle Ear has the ____ ____ and the ____.
hammar, anvil and stirrup
What part of the ear sends messages to the brain?
The cochlea which is shaped like a snail shell is lined with tiny hairs and filled with liquid
What happens in in the COCHLEA?
HAIRS in the cochlea vibrate and the movement is picked up by nerve fibers which send messages to the brain.
When there is damage or infection to the ear drum or the bones of the ear, what may take place?
permanent hearing loss
What also causes hearing loss/
aging and particularly true of certain frequencies
What animal uses ecolocation?
bats and dolphins
Ecolocation is natural sonar that uses echoes or ____ waves
reflected
Bats use echolocation to navagate, hunt prey and their sounds are about _______ Hz.
100,000
a device that uses sound to create a picture is?
SONOGRAM
SONOGRAMS can break up ____ ___ and treat soft tissue.
kidney stones