Question

A police siren of frequency fsiren is attached to a vibrating platform. The platform and siren oscillate up and down in simple harmonic motion with amplitude Ap and frequency fp. Use v for the speed of sound. Part A Find the maximum sound frequency that you would hear at a position directly above the siren. At what point in the motion of the platform is the minimum frequency heard

Answer 1

Answer:

he maximum frequency occurs when the denominator is minimum

 f’= f₀  $\frac{343}{343 + v_s}$

Explanation:

This is a doppler effect exercise, where the sound source is moving

           f = fo $\frac{v}{v-v)s}$      when the source moves towards the observer

           f ’=f_o  $\frac{v}{v+v_{sy}}$  Alexandrian source of the observer

the maximum frequency occurs when the denominator is minimum, for both it is the point of maximum approach of the two objects

          f’= f₀  $\frac{343}{343 + v_s}$