Use the decibel scale to answer the question.
-How does the intensity of sound from a concert speaker at a distance of 10 meters compare to the intensity at a distance of 40 meters?
A)Factor of 40 weaker at 40 m.
B)Factor of 4 weaker at 40 m.
C)Factor of 64 weaker at 40 m.
D)Factor of 16 weaker at 40 m.

Question

Quizplus · Accepted Answer

The intensity of sound follows an inverse square law, meaning if you double the distance, the intensity becomes 1/4th (since $2^2 = 4$). Therefore, going from 10 meters to 40 meters (which is 4 times the distance), the intensity becomes $4^2 = 16$ times weaker.

Use the Decibel Scale to Answer the Question