- #1

annamal

- 387

- 33

##v_t = v + v_s## where ##v_t## is the total velocity observed by stationary person from moving sound, v is velocity of sound and ##v_s## is velocity of sound source.

$$v = \lambda f$$

$$f_o = (v + v_s)/\lambda_o$$ where ##f_o## is frequency observed and ##\lambda_o## is wavelength observed