Intensity and Loudness

Let the source propagate a sound wave whose intensity at a point (initially) be I. Suppose we consider a case when the amplitude of the sound wave is doubled and the frequency is reduced to one-fourth. Calculate now the new intensity of sound at the same point?

Why is the roar of our national animal different from the sound of a mosquito?

In an empty room why is it that a tone sounds louder than in the room having things like furniture etc.

Which of the following options is correct?

Options for (1), (2) and (3), respectively are

A man sitting on a swing which is moving to an angle of 60° from the vertical is blowing a whistle which has a frequency of 2.0 k Hz. The whistle is 2.0 m from the fixed support point of the swing. A sound detector which detects the whistle sound is kept in front of the swing. The maximum frequency the sound detector detected is

Define intensity of sound.

Define loudness of sound.

Write a short note on intensity.