Question
What are the decibels 917m away from a 35.5 W sound source?
Answers
Elena
I=P/4πR² = 35.5/4π•917² = 3.36•10⁻⁶W/m²,
I₀= 10⁻¹² W/m²,
Sound level (in dB)
β=(10dB)log(I/I₀) =
=10•log(3.36•10⁻⁶/10⁻¹²) =65.2 dB
I₀= 10⁻¹² W/m²,
Sound level (in dB)
β=(10dB)log(I/I₀) =
=10•log(3.36•10⁻⁶/10⁻¹²) =65.2 dB