| A | B |
|---|
| Amplify | To make louder or greater |
| Eardrum | Tough membrane about .1 mm thick that transmits sound from the outer ear to middle ear |
| Cochlea | Spiral shaped structure that is filled with liquid and contains tiny hair cells |
| Intensity | Amount of energy that passes through a certain area in a specific amount of time |
| Loudness | Human perception of sound volume that depends on sound intensity |
| Decible | Unit of sound intensity |
| Pitch | How high or low a sound seems to be |
| Doppler effect | Change in wave frequency due to a wave source moving relative to an observer or an observer moving relative to a wave souce |
| Music | Any collection of souds that are deliverately used in a regular pattern |
| Sound | Describes the differences between sounds of the same pitch and loudness |
| Overtone | A vibration whose frequency is a multiple of the fundamental frequency |
| Resonator | A hollow chamber filled with air that amplifies sound when the air inside of it vibrates |
| Acoustics | Study of sound |
| Echolocation | Process of locating objects by emitting sounds and then interpreting the sound waves that are reflected from the object |
| Sonar | System that uses the reflection of underwater sound waves to detect objects |
| Ultrasound | Sound with frequency above 20,000 Hz and cannot be heard by humans |
