A person talking produces a sound level of 65 dB at a distance of 50 cm suppose the sound spreads out uniformly over a sphere centered on the person how much power in sound is the person producing?
A person talking produces a sound level of 65 dB at a distance of 50 cm suppose the sound spreads out uniformly over a sphere centered on the person how much power in sound is the person producing?
A person talking produces a sound level of 65 dB at a distance of 50 cm suppose the sound spreads out uniformly over a sphere centered on the person how much power in sound is the person producing?
Solution
dB = 10 log(I/Io)
65 = 10 log (I / 10^-12)
I = 3.16*10^-6 W/m^2
power = I*A
= 3.16*10^-6*4pi*0.5^2
= 9.93*10^-6 W
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A person talking produces a sound level of 65 dB at a distance of 50 c.docx
1. A person talking produces a sound level of 65 dB at a distance of 50 cm suppose the sound
spreads out uniformly over a sphere centered on the person how much power in sound is the
person producing?
A person talking produces a sound level of 65 dB at a distance of 50 cm suppose the sound
spreads out uniformly over a sphere centered on the person how much power in sound is the
person producing?
A person talking produces a sound level of 65 dB at a distance of 50 cm suppose the sound
spreads out uniformly over a sphere centered on the person how much power in sound is the
person producing?
Solution
dB = 10 log(I/Io)
65 = 10 log (I / 10^-12)
I = 3.16*10^-6 W/m^2
power = I*A
= 3.16*10^-6*4pi*0.5^2
= 9.93*10^-6 W
