strings+and+sound


 * Sound Wave**

Sound waves are longitudinal waves. They exist as variations of pressure in a medium such as air. They are created by the vibration of an object, which causes the air surrounding it to vibrate. The vibrating air causes the human eardrum to vibrate.

http://www.worsleyschool.net/science/files/sound/energy.html

↑ Chack this site to see how the air molecules move with the alarm clock.

The amount of initial string displacement and the amount of string tention control the sound wave.

http://illuminations.nctm.org/tools/soundwave/

↑ Go this site and try the sample activity.

For the first step, push the listen button, and try to change the slider of the initial string displacement and string tension. Make sure how does each slider affect the sound.

When you turn the animation of the sound wave with the start/stop button, you can see how the strings move.