This web page explains the physics of sonic shock waves. Text and animations describe and illustrate the wavefronts of sound from a moving point source for the cases of motion equal to, less than, and greater than the...

This site, authored by Daniel A. Russell of Kettering University, offers an animation that shows the formation of shockwaves from waves generated by a moving source. Photos show shockwaves of a bullet, an airplane, and a...

This page from then University of California, Los Angeles Galactic Center Group provides images of the galactic center over most of the electromagnetic spectrum. Each image has explanatory text, and a background section...

This web site, authored by Tajhid Robinson of Mercer University, supplies instructions for constructing a simple "Soda Bottle Speaker." A parts list and information about the materials user are included, as well as two...

The World Forum for Acoustic Ecology (WFAE) is an international interdisciplinary coalition of individuals and institutions concerned with the world soundscape as an ecologically balanced entity. WFAE encourages the...