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  2. The Hum - Wikipedia

    en.wikipedia.org/wiki/The_Hum

    The Hum is a name often given to widespread reports of a persistent and invasive low-frequency humming, rumbling, or droning noise audible to many but not all people. Hums have been reported all over the world, including the United States, the United Kingdom, Australia and Canada.

  3. Physics of whistles - Wikipedia

    en.wikipedia.org/wiki/Physics_of_whistles

    A trailing edge tone occurs when an exterior flow passes over a trailing edge. There is a whistle that is a combination of an edge tone and a trailing-edge tone and might be called a wake-edge tone. It occurs in rotating circular saws under idling conditions and may be called the circular-saw whistle. Under load conditions, blade vibration ...

  4. Yes, nearly everyone snores, but you can stop it. Here's how.

    www.aol.com/yes-nearly-everyone-snores-stop...

    Few involuntary behaviors feel as off-putting as snoring.The telltale low, vibrating rattle emitting from an open mouth is not exactly the sound or image we want on display when a friend or new ...

  5. Flue - Wikipedia

    en.wikipedia.org/wiki/Flue

    A flue is a duct, pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors. Historically the term flue meant the chimney itself. [1] In the United States, they are also known as vents for boilers and as breeching for water heaters and modern furnaces.

  6. Why Do We Keep Coming Back to Fifth Avenue? - AOL

    www.aol.com/why-keep-coming-back-fifth-120000894...

    JS: When New York is not 70 degrees, my perfect day would be a Saturday when I don't really have much to do and we can take a long walk. We live in Gramercy, so to walk up Fifth Avenue and pass ...

  7. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    This limit controller may shut the furnace off if the blower fails or if something is blocking the air flow. The heated air is then sent back through the home through supply ducts. In larger commercial applications, central heating is provided through an air handler which incorporates similar components as a furnace but on a larger scale.

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