| A | B |
|---|
| Acoustics | The study of sound |
| Cochlea | Spiral shaped, fluid filled structure in the inner ear that converts sound waves to nerve impulses |
| Decibel | Unit for sound intensity |
| Doppler effect | Change in pitch or frequency that occurs when a source of a sound is moving relative to a listener |
| Eardrum | Tough membrane in the outer ear that is about 0.1 mm thick and trasmits sound vibrations into the middle ear |
| Eacholocation | Process in which objects are located by emitting sounds and interpreting sound waves that are reflected |
| Intensity | Amount of energy that flows through a certain area in a specific amount of time |
| Loudness | Human perception of sound intensity |
| Music | Sounds that are deliberately used in a regular pattern |
| Overtone | Vibration whose frequency is a multiple of the fundamental frequency |
| Pitch | How high or low a sound seems; related to the frequency of the sound waves. |
| Resonator | Hollow, air filled chamber that amplifies sound when the air inside it vibrates |
| Sonar | System that uses the reflection of sound waves to detect objects underwater |
| Sound quality | Difference between sounds having the same pitch and loudness |
| Ultrasonic | Sound waves with frequencies above 20 |
