Question

the amplitude of a sound is
doubled then by how much time the
intensity of a sound changes.​

Answer 1

Thus, when amplitude of the wave is doubled, the loudness becomes four times

Answer 2

Explanation:

Loudness depends on the square of the amplitude of the wave.

That is, loudness∝(amplitude) 2

Thus, when amplitude of the wave is doubled, the loudness becomes four times.