Here are instructions for a simple demonstration showing how sound waves are passed from one molecule to another. Using only marbles, this experiment "mimics the way a sounds wave is produced."

An exceptional entry for interference of sound and its causes. Well illustrated and good explanations; part of a large hyper-textbook on various physics concepts.

Online physics lab experiment in which students use resonating waves inside of a closed-end air column to determine the speed of sound. The form allows students to check their answers and receive immediate feedback.

Online physics lab experiment in which students use resonating waves inside of a closed-end air column to determine the speed of sound. The form allows students to check their answers and receive immediate feedback.

Power, loudness, and decibel levels of sound waves are described and explained. The relative power output of various musical instruments is given.

A photo taken from the inside of an anechoic chamber. The effect of rebounding sound waves is kept to a minimum in such an anechoic chamber thanks to the large surface area that absorbs most of the noise.

Reginald Fessenden (1866-1932) was an inventor who worked for a time in Thomas Edison's workshop. His most notable inventions made possible the transmission of audio sounds via radio waves, and included many other radio-related...