MULTIMEDIA AND QUALITY OF SERVICE
COMPRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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how high the wave is from the crest or trough
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the frequency at which it is sampled
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the speed at which it travels through air
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None of the above
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Detailed explanation-1: -The amplitude of a sound wave can be defined as the loudness or the amount of maximum displacement of vibrating particles of the medium from their mean position when the sound is produced. It is the distance between the crest or trough and the mean position of the wave.
Detailed explanation-2: -The magnitude of the displacement between the crest and the trough from the axis is the double of the amplitude of the wave. Therefore, we can say that the height of the wave crest is called the magnitude or the amplitude of the wave.
Detailed explanation-3: -The amplitude of a wave is the height of a wave crest or the depth of a wave trough from the rest position.
Detailed explanation-4: -The amplitude (or loudness) is the height of the sound wave and is measured in decibels (dB). As the sound wave increases in amplitude the medium will expand (rarefaction). Conversely, when the sound wave decreases in amplitude the medium will compress.