Acoustics

Acoustics is the science of sound as it reacts to air, water and solid materials. Learn about topics from radar to white noise, plus find out why you can hear the ocean in a seashell.

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How LRAD Works

What makes sound a weapon? Review the basics of sound and discover exactly how the LRAD produces its "beam of sound." We'll also explore LRAD's hailing and warning abilities and other uses for sound.


Can you really shatter a glass with a high note?

There are so many things in this world that are possible, and shattering glass with sonic force is one of them – but just how probable is it, really?

Can a sound wave kill you?

A sound wave alone probably won't kill you. Crank the volume on a terrible song, though, and you just might annoy everyone to death.

The Skinny on Sonic Booms

A sonic boom occurs when a vessel breaks the speed of sound. So what is this infamous sonic boom, if not the shattering of the picture-window-in-the-sky?

Did you ever wonder how to measure how fast sound travels in the air? Read this article to learn how to measure sound travel in the air.

How Tuning Forks Work

Pianos lose their tuning, guitars fall out of key -- even church organs need to be tuned every now and then. For centuries, the only sure-fire way to tell if an instrument was in tune was to use a tuning fork.

Overtone, a sound accompanying the main tone produced by a vibrating body. The number and loudness of overtones determine the timbre, or tone color, of a musical sound.

Resonance, An object free to vibrate tends to do so at a specific rate called the object's natural, or resonant, frequency.

Sound. When a drum is struck, the drumhead vibrates and the vibrations are transmitted through the air in the form of waves.

Tuning Fork, a small U-shaped piece of steel that, when struck, produces a clear tone of unvarying pitch.

Acoustics, the branch of physics that deals with the production, transmission, properties, and effects of sound waves.