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This site gives an overview of the physics of sound through a series of links to relevant articles.
A few pages that have interactive elements to demonstrate what sound is.
Talks about the use of ultrasound, sound at frequencies above audible.
A fun activity about sound and vibrations to make a little toy that makes a sound like a bee. All you need is a two lollipop sticks, a rubber band, some card and some string.
A good explanation of how sound waves can interfere and affect what you hear. Includes details of a demonstration with a tuning fork.
An explanation of sound and how it relates to space.
Fun demonstration of air pressure with shaving foam and a vacuum pump.
When two sound waves of different frequency approach your ear, the alternating constructive and destructive interference causes the sound to be alternatively soft and loud - a phenomenon which is ...
A simple explanation of why sound travels long distances at night. There are some attractive graphics.
Hear the sound of the Big Bang as recreated by John Cramer (link to the audio file at the bottom of the page)
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