Mr. Fullerton showed us this intriguing instrument in class and I just HAD to find it for myself. The Theremin is a musical instrument that changes its pitch and volume based on the electric field surrounding two rods. The player's right hand controls the pitch and his or her left hand controls volume. In AP Physics, we normally calculate electric field using with a value of 8.85x10^-12F/m, but this only works for a vacuum or air. When the player brings his or her hands closer to the instrument, the permittivity of the area of the field is changed, and E (electric field) changes according to .
Here is an awesome example of the Theremin in action:
I feel like it sounds similar to a soprano when in its higher register and a cello in its lower register. What do you guys think?