A barking dog delivers about 1.0 mW of power, which is assumed to be uniformly distributed in all directions. What is the intensity level in decibels at a distance 5.00 m from the dog? The threshold of human hearing is 1.0 10-12 W/m2.
A) 61 dB
B) 63 dB
C) 65 dB
D) 68 dB
Question 2
The intensity at a distance of 6.0 m from a source that is radiating equally in all directions is 6.0 10-10 W/m2. What is the intensity level in dB? The threshold of human hearing is 1.0 10-12 W/m2.
A) 18 dB
B) 23 dB
C) 28 dB
D) 32 dB
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