Which are the most important property of sound?

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Amplitude

Frequency

Loudness

Both 1 and 2

answer is C.

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Detailed Solution

Loudness is the most important property of sound.
Amplitude and frequency are sound's two most important properties because amplitude determines loudness, and frequency determines pitch. The loudness and pitch of the sound have an impact on its quality. The amplitude of any wave tells us how much energy it has. It is the distance between the wave's equilibrium position and maximum vertical displacement. A sound wave's amplitude is proportional to its loudness. The louder the sound, the more energy there is. The frequency of a wave is the rate at which vibrations travel through a medium. In terms of sound waves, frequency is related to pitch. The frequency of sound waves determines whether a sound is perceived as high or low-pitched. A higher frequency indicates a higher pitch sound, while a lower frequency indicates a lower pitch sound.

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