BEATS

Animation of Beats

This animation shows how beats are produced from the superposition of two waves.

At the top of the screen, two traveling sine waves are shown. They have slightly different wavelengths and frequencies. At the bottom of the screen, the superposition of the two waves is shown. Beats are produced as the two waves sometimes constructively interfere and sometimes destructively interfere.

OpenGL Version

The program recognizes the following commands. The command may be executed by either clicking the button with the mouse (first column below) or by pressing a key (second column below). The mouse buttons may be removed from the screen by pressing the M key. Press M again to restore buttons.

The program recognizes the following commands:

pause S Stop animation. Press G to resume animation.
resume G Resume animation.
vlines L Vertical lines are drawn at the positions of constructive and destructive interference. Press L again to remove the lines.
quite Q Quit program.

DOS Version

S	Stop animation. Press any key to resume animation.
L	Vertical lines are drawn at the positions of constructive and destructive interference. Press G to remove the lines.
Q	Quit program.
?	Help. These commands are listed.

pause	S	Stop animation. Press G to resume animation.
resume	G	Resume animation.
vlines	L	Vertical lines are drawn at the positions of constructive and destructive interference. Press L again to remove the lines.
quite	Q	Quit program.