In this lab, you will learn about where sound comes from, how it travels, and what changes the loudness of a sound or the pitch of a sound. We will do this using a slinky and a rubber band guitar.
Download the labs!
Student Version
Student Advanced Version
Recommended Prerequisites:
- Good for most students
- Advanced version has an extra section on tuning instruments
Key Concepts:
- Sound comes from moving objects. Sound is made of vibrating molecules that push against one another.
- Molecules don’t travel across the room to get the sound to us; they vibrate in a very small space and transfer sound energy by collisions.
- The harder the molecules push each other, the louder the sound we hear.
- The faster the molecules push each other, the higher the pitch we hear.
- STUDENT ADVANCED ONLY: Sound reflects off of dense objects as an echo. In a musical instrument, reflected sound is trapped to form standing waves, which we hear as tones.
Materials:
- a large plastic tub, 6 inches or deeper
- water
- a cereal bowl
- a ping pong ball
- a pencil
- Slinkies, or one very large Slinky
- Length of rope (1/4 to 1/2 thickness, at least 6 feet long)
- Shive Wave Machine (special demo – not readily available)
- Shoebox or tissue box
- 4 to 6 rubber bands, of varying lengths and thicknesses
- Craft sticks
- plastic drinking straws, thin
- 6 plastic drinking straws, thick
- hole punch
- scissors
Thanks for taking time in posting such good articles with us. Hope others might find this article as useful.
Thanks for taking time in posting such article with us. Hope other readers might find this article as good.
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