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Chapter 16
SOUND Vocabulary
Term | Definition |
---|---|
Echo | A reflected sound wave |
Elasticity | The ability of a material to bounce back after being disturbed |
Density | How much matter, or mass, there is in a given amount of space, or volume |
Loudness | Describes your perception of the energy of a sound |
Intensity | The amount of energy a sound wave carries per second through a unit area |
Decibel (dB) | The loudness of different sounds compared |
Pitch | The description of how high or low the sound seems to a person |
Ultrasound | Sound waves with frequencies above the normal human range of hearing |
Infrasound | Sounds with frequencies below the human range of hearing |
Larynx | Where you vocal cords are located |
Doppler Effect | The change in frequency of a wave as its source moves in relation to an observer |
Causes of the Doppler Effect | When a sound source moves, the frequency of the waves changes because the motion of the source adds to the motion of the waves |
Causes of a Sonic Boom | A shock wave forms as the sound waves overlap, which causes the shock wave to release a huge amount of energy. |
Fundamental Tone | The lowest natural frequency of an object |
Overtone | The object's higher natural frequencies |
Acoustics | The study of how sounds interact with each other and the environment |
Reverberation | The echoes of a sound are heard after the sound source stops producing sound waves |
Ear Canal | It collects sound waves and directs them into a narrow region (ear canal) |
Eardrum | A small, tightly stretched, drum like membrane |
Cochlea | A fluid-filled cavity shaped like a snail shell |
Echolocation | The use of reflected sound waves to determine distances or to locate objects |
Sonar | A system that uses reflected sound waves to detect and locate objects under water |
Sonogram | The device uses the reflected ultrasound waves to create a picture |