A 0.980 kW siren emits sound isotropically at a constant frequency. The density of air is p = 1.20 kgm and the speed of sound in air is v= 343.0 ms ¹.

Part 1)

You are a distance d = 82.9 m away from the siren. What is the sound level as the wave from e siren passes you?

Part 2)

What is the maximum pressure amplitude as the sound wave passes you?

Part 3)

You decide to investigate the sound and start running towards the siren at a constant speed 5.340 ms ¹. While you are running, you measure the sound frequency to be 1252 Hz. What is the frequency of the wave

emitted by the siren?