Vt=120000m/h = 120000m/3600s = 33.33 m/s
Fp = ((Vs+Vp)/(Vs-Vt))*Ft
Fp = ((343+0)/(343-33.33))*600 Hz
Fp = (343/309.7)*600 = 664.6 Hz = Freq.
heard by the person.
L = Vs/Fp = 343/664.6 = 0.516 m. = Wave-
length.
An approaching train produces the RP1 signal (attention signal) at 600 Hz . The train moves with the speed of 120 km/h. What is the frequency and the wavelength of the sound
detected by a person standing next to the track?
1 answer
1 answer