PBS
Pbs Teachers: Scientific American: The Art of Science: Ben Franklin's Harmonica
Investigate the science behind the glass harmonica, and try Ben Franklin's version. Explore the world of sound with hearing and other senses, and find out how different length straws influence sound by modifying frequency.
Science Bob Pflugfelder
Science Bob: Make a Simple Duck Call!
Contains a procedure for using a plastic straw to create a device capable of producing a duck call when air is passed through. The site introduces the concept of vibration in sound production.
Hunkins Experiments
Hunkin's Experiments: Sound Experiments
Hunkin's Experiments is a group of simple cartoon illustrations of scientific principles. Some would work well in the classroom, but others have little value beyond entertaining students. All of the projects are easy to do. This group of...
PBS
Pbs Teachers: Sweet Spot
Discover the section of a baseball bat that will make the ball go the farthest by locating the area that doesn't produce vibrations when hit.
Other
University of Winnipeg: The Simple Pendulum
The periodic motion of a pendulum is described with words and equations; little conceptual emphasis. Sample problems with solutions are provided.
Science Fun for Everyone
Science Fun: Balloon Speakers
Learn about sound waves with this science experiment. All you need is a balloon!
Mocomi & Anibrain Digital Technologies
Mocomi: What Is Sound?
Defines sound, how it travels, the components of a sound wave, the different types, and other fun facts.
Other
Mostly Music: Music Physics
A discussion of a variety of physics topics related to music and sound. Topics include vibrations, sound waves, frequency and pitch, resonance and overtones.