Sound wave intensity of elephants

AI Thread Summary
Elephants communicate using infrasound, generating vocalizations as low as 14 Hz that can travel up to 10 km. The intensity of these sounds can reach 103 dB at a distance of 5 meters, corresponding to an intensity of 0.0199 W/m². To find the intensity level at 10 km, the relationship between intensity and distance must be applied, using the formula I1/R1² = I2/R2². After calculating the new intensity, it can be converted into decibels using the equation B = 10 log(I/10^-12). This approach will yield the intensity level of the infrasound at the specified distance.
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Homework Statement



There is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14hz that can travel up to 10km. The intensity level of these sounds can reach 103dB, measured a distance of 5.0m from the source. Deteremine the intensity level of the infrasound 10km from the source, assuming the sound energy radiates uniformly in all directions.


Homework Equations



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

The Attempt at a Solution



i found the intensity at an intensity level of 103dB to be.0199W/m^2. I'm just not sure where to go from here. Suggestions would be appreciated.

thanks
 
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Intensityi is inversly proportional to square of the distance.
Using I1/R1^2 = I2/R2^2, find I2. Then convert it into dB.
 

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