3-4: 2 SEE ANSWER

Answer: A (true)

To do this problem you must think in phons.

First, find the loudness for a 1000 Hz tone which is 20 db using the formula L = 2^((LL-40)/2) = 2^(-2) = 1/4

Next, find the loudness for a 1000 Hz tone which is 10 db using the formula L = 2^((LL-40)/2) = 2^(-3) = 1/8

We can see that the loudness for a 20 db sound is double the loudness for that of a 10 db sound.