If the amplitude of sound is doubled and the frequency is

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If the amplitude of sound is doubled and the frequency is reduced to one fourth, the intensity of sound at the same point will be

1. increasing by a factor of 2
2. decreasing by a factor of 2
3. decreasing by a factor of 4
4. unchanged

Intensity is proportional to (amplitude)² and also intensity α (frequency)². Therefore, intensity becomes

	2²	=	1	th
	4²		4