19 terms

DIVE Integrated Chemistry and Physics Lesson 27

Sound, wave, compression, rarefraction, tone, pitch, frequency, infrasonic wave, ultrasonic wave, loudness, decibel (db), threshold of hearing, amplitude, acoustics, resonance, beats, Doppler effect, sonar, echolocation, ultrasound
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Terms in this set (...)

Sound wave
Waves caused by vibrations that are transmitted through matter. If they are in the proper frequency, they can be perceived by the ear.
Compression
In a sound wave, it is a repeating area of compressed air, caused by a vibration.
rarefaction
The area of a sound wave where the air molecules are spread out, that alternates with compressions.
tone
Tone is a word used to describe pitch.
pitch
The distance between the threads of a screw, that determine its mechanical advantage. 2) Related to frequency, it is how high or low our ears perceive a tone to be.
frequency
The number of cycles, or wavelengths, per second for waves.
infrasonic wave
Waves that have a lower frequency than the human ear can perceive.
ultrasonic wave
Waves that have a higher frequency than the human ear can perceive.
loudness
How strong or weak a sound is perceived to be, based on its intensity.
decibel (db)
Unit of measure used to express the intensity of sound.
threshold of hearing
The quietest sound that can be picked up by the ear.
amplitude
The height, or depth, reached by an oscillating wave.
acoustics
The study of sound, and how it is affected by objects of various shapes and materials.
resonance
Vibrations caused by matching the natural frequency of an object.
beats
The destructive interference caused by two sound waves that have similar amplitudes, but slightly different frequencies.
Doppler effect
The variation in pitch of a sound caused by motion.
sonar
Technology that uses sound waves and their reflections to locate objects.
echolocation
Biological sonar found in animals such as bats.
ultrasound
High frequency sounds can be used in medical imaging devices.