Concept explainers
The power intercepted by an unprotected ear at a given distance from a jet airplane engine.
Answer to Problem 72GP
The power intercepted is
Explanation of Solution
Given:
Sound level, ß = 140 dB,
Distance, d
= 30 m,
Radius, r
= 2 cm = 0.02 m
Formula used:
Here,
I = Intensity of sound
Calculation:
The power intercepted by unprotected ear can be calculated by using the formula,
Where,
P = Power in W
I0 = 1×10-12 W/m2
Substitute the values in the equation,
Conclusion:
The power intercepted by an unprotected ear at a distance of 30 m from a jet airplane engine is 0.5 W.
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