Physical Science Chapter 12 Vocabulary
Terms
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- Eardrum
- the tough membrane about 0.1 mm thick
- Cochlea
- a spiral shaped structure that is filled with liquid and contains tiny hair cells
- Intensity
- the amount of energy that flows through a certain area in a specific amount of time
- Loudness
- the human perception of sound intensity
- Decibel
- unit on the scale for sound intensity
- Pitch
- how high or low a sound seems to be
- Ultrasonic
- sound frequencies above 20,000 Hz
- Doppler effect
- the change in pitch or wave frequency due to a moving sound source
- Reverberation
- the echoing effect produced by many reflections of sound
- Acoustics
- the study of sound
- Echolocation
- the process of locating objects by emitting sounds and interrupting the sound waves that are reflected back
- Sonar
- a system that uses the reflection of underwater sound waves to detect objects