Question

Choose the correct option in each of the following:

Which of the following depends on the amplitude of vibrations.

• A. Pitch
• B. Quality
• C. Loudness
• D. None of the above.

Answer 1

The correct option is C

Loudness

Explanation of the correct option:

Option C:

Loudness:

1. The amplitude of the sound determines the loudness of the sound. A faint sound will have a small amplitude while that has a loud sound will have a high amplitude.
2. Loudness is directly proportional to amplitude. If amplitude increases, loudness also increases or vice versa.
3. The SI unit of loudness is watt per meter (W/m).
4. Loudness is a scalar quantity.

Explanation of the incorrect option:

Option A:

Pitch or sharpness:

1. The sensation of a frequency is commonly referred to as the pitch of a sound. A high pitch sound corresponds to a high-frequency sound wave and a low pitch sound corresponds to a low-frequency sound wave.
2. Hertz (Hz) is the SI unit of frequency.

Option B:

Quality:

1. The quality of the sound is that property that enables us to make difference between one sound from another having the same pitch and loudness.
2. The sound which is more pleasant is said to be rich in quality.

So, the correct answer is option C.