The loudness L(x) measured in decibels, of a sound of intensity x, measured in watts per square meter, is defined as L(x)=10 log (x/I base 0=10^-12 watt per square meter is the least intense sound that a human ear can detect. Determin the loudness, in decibels, of each following sounds. 1. Diesel truck traveling 40 miles per hour 50 feet awar: intensity 10 times that of a passenger car traveling 50 miles per hour 50 feet away whose loudness is 70 decibels
