In acoustics, the intensity of sound is measure in decibels (dB). The sound intensity level (SIL) is given by L = 10 log () dB, where I is the sound intensity, and lo is the reference sound intensity. a. How many times more intense is a 50 dB sound than a 30 dB sound? (2) b. The perceived loudness of a sound doubles for every 10 dB increases in the SIL. Suppose a jackhammer has SIL 90 dB, and a passing car has 2% of the sound Intensity of the jackhammer. i. Find, in decibels, the SIL of the car. li. How much louder will the jackhammer be perceived than the car