Question

If the amplitude of a sound in doubled, then the loudness increases:

• A. Remains same
• B. Increases three times
• C. Increases four time
• D. Increases two times

Answer 1

The correct option is C

Increases four time

When amplitude is doubled the loudness increases four time because, the loudness of a sound is proportional to square of the amplitude. Hence doubling the amplitudes increases loudness by four times.