Question

0.18. Derive an expression for apparent frequency when source is moving and listener is stationary.​

Answer 1

If listener is moving towards source then apparent frequency is given by, n = n 0 ( v + v L v ) , i.e., apparent frequency increases. If listener is receding away from source then apparent frequency is given by, n = n 0 ( v - v L v ) , i.e., apparent frequency decrease