Question

The loudness of sound is determined by the

• A. amplitude of vibration
• B. frequency of vibration
• C. the ratio of amplitude and frequency of vibration
• D. product of amplitude and frequency of vibration

Answer 1

The correct option is A

amplitude of vibration

The explanation for correct option:

Option A: amplitude of vibration.

1. The intensity or loudness of a sound depends upon the extent to which the sounding body vibrates, i.e., the amplitude of vibration.
2. A sound is louder as the amplitude of vibration is greater, and the intensity decreases as the distance from the source increases.
3. Therefore, the loudness of sound is determined by the amplitude of vibration.
4. Hence, Option A is correct.

Explanation for Incorrect Option(s):

Option B: frequency of vibration

1. Frequency is the number of vibrations of the sound per second.
2. It will affect the pitch of the sound, not the loudness.
3. Therefore, the loudness of a sound is not determined by its frequency of it.
4. Hence, Option B is incorrect.

Option C: the ratio of amplitude and frequency of vibration

1. The intensity or loudness of a sound depends on the amplitude of vibration but is independent of the frequency of vibration.
2. Therefore, the loudness of a sound is not determined by the ratio of amplitude and frequency of vibration.
3. Hence, Option C is incorrect.

Option D: product of amplitude and frequency of vibration.

1. The intensity or loudness of a sound depends on the amplitude of vibration but is independent of the frequency of vibration.
2. Therefore, the loudness of a sound is not determined by the product of amplitude and frequency of vibration.
3. Hence, Option D is incorrect.

Thus, option A is the correct answer.