Answer:
12.06 times
Explanation:
The ration of intensity of sound of 93 dB and 43 dB is given as follows
I₁ / I₂ = [tex](10)^\frac{9.3}{4.3}[/tex]
I₁ / I₂ = 145.44
The intensity of sound heard by old person is 145.44 times the sound heard by young adult.
We know that intensity of sound is proportional to square of frequency , ie
I ∝ n²
In order to increase the intensity of later sound 145.44 times , we shall have to increase its frequency √145.44 times or 12.06 times
So 12.06 times is the answer.
