Part A Table 15.3 in the textbook gives an estimate for the sound intensity of a

Question

Part A Table 15.3 in the textbook gives an estimate for the sound intensity of a whisper at 1.0 m. What is the sound intensity of a whisper at a distance of 3.0 m , in W/m2?
PART B: What is the corresponding sound intensity level in dB?
Part A Table 15.3 in the textbook gives an estimate for the sound intensity of a whisper at 1.0 m. What is the sound intensity of a whisper at a distance of 3.0 m , in W/m2?
PART B: What is the corresponding sound intensity level in dB?
Part A Table 15.3 in the textbook gives an estimate for the sound intensity of a whisper at 1.0 m. What is the sound intensity of a whisper at a distance of 3.0 m , in W/m2?
PART B: What is the corresponding sound intensity level in dB?

Explanation / Answer

at 1 meter , INtensity = 10^-10 W/m^2

I = P / (4 pi r^2)

I r^2 = constant

(10^-10 ) (1^2) = ( I ) (3^2)

I = 1.111 x 10^-11 W/m^2 .........Ans

(B) Sound Level = 10 log ( I / 10^-12 )

= 10.5 dB

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