| A | B |
|---|
| compression | Area of bunched up air particles created by object's vibrations (the bunched up area) |
| rarefaction | Area of "spread out" air particles by vibration, opposite of compression |
| medium | Any sound conducting liquid, solid, or gas |
| hammer, anvil, and stirrup | The three tiny bones in the middle ear |
| cochlea | The stirrup vibrates this. It is attached to a nerve that sends brain messages, has liquid inside of it |
| semicircular canals | What gives you balance |
| auditory nerve | What connects to your cochlea and sends messages to the brain |
| eustachain tube | That is where your ear drains |
| frequency | Number of times an object vibrates in one second. Measured in Hertz, recognized by your ears as differences in pitch |
| hertz | Unit that measures frequency. Humans hear sounds up to 20,000 of these |
| pitch | The highness or lowness of a sound |
| low pitch | Has a slow vibration |
| high pitch | Has a fast vibration |
