This applet will allow you to investigate how the power, intensity and sound level of a three dimensional wave are related. You can enter your power level in the upper box. When you click on the graphical area to the left of the boxes, the distance from the center to the point you clicked is calculated. This is used to calculate the intensity and then the sound level.
The applet start with units of meters on the graphic. You can choose smaller steps or larger steps by clicking the appropriate radio button at the lower left side.
Last Modified on Monday, October 29, 2001