The loudness level of a sound can be expressed by comparing the sound’s intensity to the intensity of a sound barely audible to the human ear. The formula
Use the form of the formula from part (a) to answer this question. If a sound has an intensity 1 divided by 100th of 1/100th of the intensity of a louder sound how much smaller on the decibel scale is the loudness level of the less intense sound
Evaluate the expression without using a calculator.