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What Is Brown Noise?
July 30, 2013 | ArticleBrown noise is one of the many colors of noise, which also include white noise, pink noise and blue noise. Brown noise is also known as Brownian noise because its change in sound signal from one moment to the next is random.
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What Is Pink Noise?
July 29, 2013 | ArticlePink noise is a color of noise, not entirely unlike white noise. Both white and pink noise contain all the frequencies that are audible to humans — 20 hertz to 20,000 hertz — but the way signal power is distributed differs.
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Do Indoor Plants Really Clean the Air?
July 29, 2013 | ArticleSure, that potted fern is pretty, but can it really spruce up the air quality in your home? Plants, including indoor plants, are notoriously adept at absorbing gases through pores on the surface of their leaves.
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Does Leaving Fluorescent Lights On Save Energy?
July 25, 2013 | ArticleFluorescent lamps, including compact fluorescent lights, use about 75 percent less energy than incandescent bulbs. But it's widely believed that these popular bulbs use a lot of energy to start up. Should you just leave them on?
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Animal Sex: How Birds Do It
July 25, 2013 | ArticleSure, birds can fly, but how do they have sex? Can they do it in the air? And where do they keep their reproductive organs? For humans to understand bird sex, they must first put all thoughts of mammalian sex organs out of their heads.
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What's the Largest Building in the World?
July 25, 2013 | ArticleIn July 2013, China heralded the opening of its New Century Global Center, an immense 18.9 million square-foot building structure that some are calling the largest building in the world. But is China's mega-structure really the world's biggest building?
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Mysterious Hum Driving People Crazy Around the World
July 25, 2013 | ArticleThe Hum, a steady, droning sound that's heard in places as disparate as Taos, New Mexico, Bristol, England, and Largs, Scotland, affects only a small percentage of the population in those areas. What causes the Hum remains a mystery.
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Does 'Roid Rage' Really Exist?
July 24, 2013 | ArticleAbusing steroids to build muscle is linked to numerous health problems, from high cholesterol to liver damage – less clear is whether steroid use produces the psychotic episode called "roid rage."
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What Is White Noise?
July 23, 2013 | ArticlePeople often think of white noise as television static, or the serene sound of ocean waves. But physicists and sound technicians use a much more specific definition of white noise.
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What Is Déjà Vu?
July 18, 2013 | ArticleDéjà vu has been under investigation for years by scientists, who have yet to offer a complete explanation for the phenomenon. Recent research, however, has yielded some clues into what causes déjà vu.
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