Activity Assignment [ A-3 ]

Fill out this worksheet and turn in during class on the day assigned on the Schedule.

Find a place where where you can see a continuing vibrating source, like a radio playing, an engine running, bells ringing, someone talking, etc. You may want to bring a friend to create it. Listen while the pressure wave travels in a direct path from it to you. Then move around a corner and compare the sound when the pressure wave has to bend around the corner.

1. Where were you when you were listening?


2. What was the source of the vibrations?


3. Make a diagram showing the source of vibrations, the pressure wave spreading out, the structure that could block its direct path, and your position when had gone around the corner to listen.
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
4. Do you think it produced mostly high or mostly low frequencies?


5. How far away were you when you could see it?


6. How far away were you from the corner when you couldn't see it?


7. How did the volume compare between the two listening locations?



8. How did the tone compare between the two positions you listened from? Did one sound clearer or more muffled than the other?





9. Was the pressure wave being mostly reflected, refracted, or diffracted as it goes around the corner?