AP BIOLOGY

Detailed explanation-1: -The amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound, and a smaller amplitude means a softer sound.

Detailed explanation-2: -The intensity or loudness of a sound depends upon the extent to which the sounding body vibrates, i.e., the amplitude of vibration. A sound is louder as the amplitude of vibration is greater, and the intensity decreases as the distance from the source increases.

Detailed explanation-3: -The amplitude of a wave is related to the amount of energy it carries. A high amplitude wave carries a large amount of energy; a low amplitude wave carries a small amount of energy.

Detailed explanation-4: -Loudness is proportional to the square of the amplitude. Thus, if the amplitude is increased by three times, the loudness also increases by nine times.