Horn Stand
What frequency will a person standing beside the road hear if a car horn is blown?
A car horn with a frequency of 250 Hz. What frequency will a person standing beside the Road hear if the horn is blown while the car is traveling toward him at 65 mi/hr? Assume 0 degrees C.
look up the speed of sound at 0C and plug it into the following equation:
doppler Δf = –v/λ = –vf/s
v = velocity of source relative to listener
λ = wavelength of source, relative to source
f = frequency of source, relative to source
s = 343 m/s = speed of sound
.
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