Other
The University of Wales: Semiotics for Beginners
Click on Denotation, Connotation, and Myth. A discourse in the use of "denotation" and "connotation" as they refer to semiotics and cultural myths.
Georgia State University
Georgia State University: Hyper Physics: Resonance
This hypertext physics course surveys sound resonance in musical instruments. Illustrated.
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.