Science (Sound) - 1st Periodical Examination

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Environmental Science

Energy Resources and Consumption

Last updated 7:36 AM on 9/26/22
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31 Terms

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Sound
A sensation that stimulates the ears.
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Ears
The organs for hearing.
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Pleasant Sounds
Sounds pleasant to the ears.
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Noise
Sounds unpleasant to the ears.
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Sound Energy
An energy produced by a vibrating body.
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Resonance
The quality or condition wherein vibrations or waves are prolonged by an external force or by another vibration.
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Echo
The reflection of sound when it bounces back from a hard surface.
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Reverberation
A series of echoes.
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Frequency
The number of vibrations of a sound per unit of time.
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Hertz
Vibrations per second.
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Pitch
The highness or lowness of a tone.
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20 Hz to 20 000 Hz
The number of Hertz humans can hear.
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Wavelength
The horizontal distance from one crest of a wave to another or from one trough to another.
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Crest
The highest part of a wave.
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Through
The lowest part of a wave.
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2 cm to 17 m
The length of a wavelength humans can hear.
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Amplitude
The measure of the amount of energy of a sound wave.
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Intensity
The magnitude of sound energy as it travels through a unit area.
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Volume
The loudness or the softness of a sound.
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Decibel
Intensity or volume's measurement.
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Alexander Graham Bell
The inventor of the telephone.
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0 dB
Threshold of Hearing
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140 dB
Threshold of Pain
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Power
The measure of sound energy per unit of time.
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Quality
The fullness and richness of a sound.
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344 m/s
Average speed of sound.
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Solid
Matter where particles are compact and closely arranged next to one another.
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Liquid
Matter where particles are slightly apart.
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Gas
Matter where particles are widely dispersed.
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Salinity
The measure of amount of salt dissolved in liquids.
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Humidity
The amount of moisture in air.