Select the boy icon. Select the lowest pitch by selecting the bottom music note located to the bottom right of the lab activity. Select the GO button. What happened to the volume of the sound as the sound source moved past the observer? Record your observations.

When the sound source moved past the observer, the volume of the sound from the source decreased.

Explanation:

This happened like this because the sound source is now at a distance from the observer therefore the volume of sound reaching the observer will decrease as the distance increase.