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Sound Vocabulary
Chapter 16 Sound Vocabulary
Term | Definition |
---|---|
Sound | A disturbance that travels through a medium as a longitudinal wave |
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 | 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) | A unit that compares the loudness of different sounds |
Pitch | A 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 waves with frequencies below the normal human range of hearing |
Larynx | Voice box |
Doppler Effect | The change in frequency of a wave at its source moves in relation to an observer |
What causes 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 |
What causes a Sonic Boom? | When a shock wave releases a huge amount of energy, the loud noise people hear is a sonic boom. |
Fundamental Tone | The lowest 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 echos of a sound are heard after the sound source stops producing sound waves |
Ear Canal | The narrow region in an ear that sound waves pass through |
Ear Drum | A small, tightly stretched, drum-like membrane |
Cochlea | A fluid-filled cavity shaped like a snail shell |
Echolation | The use of reflected sounds to determine distances or to locate objects |
Sonar | A system that uses reflected sound waves to detect and locate objects underwater |
Sonogram | The picture created from the reflected ultrasound |