Sound Flashcards
What is amplitude?
The distance from the middle of a wave to the top or the bottom (half the wave’s height)
What is the auditory canal?
The passage in the ear from the outer ear to the ear drum
What is the auditory nerve?
It is a nerve than an electrical signal travels along to reach your brain
What is a cochlea?
A snail-shaped tube in the inner ear with the sensory cells that detect sound
What is a compression?
The part of a longitudinal wave where the air particles are closer together
What is a crest?
The top of a wave
What is the unit of sound?
decibels (dB)
What is a diaphragm?
The part of the microphone that vibrates when a sound wave hits it
What is a hertz?
The unit frequency is measured in
What are the ossicles?
small bones that transfer vibrations from the outer ear to the inner ear
What is in your outer ear?
The pinna (the outside of your ear), the ear drum and the auditory canal.
What is superpose?
When 2 waves join together so that they add together or cancel out.
All sound is caused by something ____. Sound travels through ____, so the waves can’t travel through a ____. You hear things when ____. Sound travels faster when the particles ____.
All sound is caused by something vibrating. Sound travels through particles, so the waves can’t travel through a vacuum. You hear things when your eardrums vibrate. Sound travels faster when the particles are closer together.
What do the sound graphs with the squiggly lines tell you?
The higher the line, the louder it is, the lower the lines the quieter the sound it.
The closer the lines are, the higher the pitch, the spread out lines are lower pitch
What is the spped of sound?
330m/s in air
1500m/s in water
6000m/s in steel
What are the three parts of the ear you need to know?
pinna (outer ear), nerve to brain (you can work out what that is) and ear drum (yeah you probably know what that is too.)
What is sound?
Sound is a mechanical method of transferring energy between stores
What is another name for sound waves?
Longitudinal waves, because vibrations are parallel to the direction of travel
What is oscillation?
when something constantly vibrates back and forth
What is frequency?
The number of waves per second
What is an echo?
The reflection of a sound wave.
Whats your hearing range?
20Hz to 20,000Hz
