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.
The idea that something so intangible can lift objects can seem unbelievable, but it's a real phenomenon. Learn how acoustic levitation takes advantage of the properties of sound to cause solids, liquids and heavy gases to float. See more »
The idea that something so intangible can lift objects can seem unbelievable, but it's a real phenomenon. Learn how acoustic levitation takes advantage of the properties of sound to cause solids, liquids and heavy gases to float.
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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.
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Radar seems to have infinite uses: Police use it to clock your speed, NASA uses it to follow satellites, meteorologists use it to track storms and the military uses it to track the enemy ... Learn all about radar technology!
See more »Acoustics, the branch of physics that deals with the production, transmission, properties, and effects of sound waves.
See more »I was watching an old movie today, and two kids (neighbors) were talking to each other using two tin cans and a string. Does that really work? If so, why does it work?
See more »Noise, unwanted sound. Whether or not a certain sound is referred to as "noise" depends on the viewpoint of the listener.
See more »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.
See more »Pitch, a dark-colored, thick, sticky substance produced from any one of several sources.
See more »Resonance, An object free to vibrate tends to do so at a specific rate called the object's natural, or resonant, frequency.
See more »Sound. When a drum is struck, the drumhead vibrates and the vibrations are transmitted through the air in the form of waves.
See more »Tuning Fork, a small U-shaped piece of steel that, when struck, produces a clear tone of unvarying pitch.
See more »Ultrasonics, the branch of physics and engineering dealing with highfrequency sound waves.
See more »When an airplane flies faster than the speed of sound, you hear a large booming sound. But how can something that seems so simple cause such a boom?
See more »The decibel scale measures sound based on human hearing, which makes it one of the most unusual scientific measurements. How are decibel calculated and what do they tell us about sound?
See more »If you took all of the imaginable tones that a human can hear and combined them together, you would have white noise. This phenomenon gets its name from white light -- what do the two have in common?
See more »Do you remember holding a large conch shell up to your ear to hear the ocean? Why does this work even when you're far away from the sea?
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