The ________ of the sound is the average amount of energy travelling across a unit area per unit of time in a specific direction.

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loudness

intensity

pitch

quality

answer is A.

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Detailed Solution

Sound intensity is the amount of energy that flows per unit of time via a unit area that is perpendicular to the direction of the sound waves.
The power carried by sound waves in one unit area is referred to as the intensity of the sound. It is the amount of energy that flows per unit of time.
The intensity is perpendicular to the sound wave region. The intensity of the sound rises as the sound wave oscillation increases. The intensity of sound may be quantified.
Hence, the average amount of energy passing through a unit area per unit of time in a specified direction is called the intensity of the sound.

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