Physics
Sound
Sound
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A longitudinal wave that travels through a medium.
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Sound is a longitudinal wave that travels through a medium, such as air, water, or solids. It is produced by vibrating objects.
Speed of Sound
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The distance sound travels per unit time.
v = fλ
The speed of sound is the distance sound travels per unit time. It depends on the properties of the medium through which it propagates.
Infrasonic
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Sound waves with frequencies below the human hearing range.
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Infrasonic waves are sound waves with frequencies below the human hearing range (typically below 20 Hz).
Ultrasonic
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Sound waves with frequencies above the human hearing range.
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Ultrasonic waves are sound waves with frequencies above the human hearing range (typically above 20 kHz).
Loudness
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A subjective measure of the intensity of sound.
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Loudness is a subjective measure of the intensity of sound as perceived by the human ear. It depends on both the intensity and frequency of the sound.
Pitch
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The perceived frequency of a sound.
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Pitch is the perceived frequency of a sound, which determines how high or low it sounds to the human ear.
Quality
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The timbre or tone color of a sound.
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Quality (or timbre) is the characteristic that distinguishes sounds with the same pitch and loudness. It depends on the combination of harmonics present in the sound.