Which of the following determines the loudness or softness of the sound?
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A.
Frequency
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B.
Wave velocity
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C.
Amplitude
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D.
Oscillation
Correct Answer:
C. Amplitude
Explanation:
The loudness or softness of a sound is primarily determined by the amplitude of the sound wave. Amplitude represents the magnitude of vibration or the height of the wave; higher amplitude waves possess more energy and greater intensity, which the human ear perceives as louder. While factors like frequency affect pitch and distance from the source influences intensity, amplitude remains the fundamental physical property that dictates perceived volume. Therefore, a sound with a larger amplitude will sound louder because it exerts more pressure on the ear.
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