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  2. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Noise -cancelling headphones alongside a carry case. Noise-cancelling headphones are headphones which suppress unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing . Noise cancellation makes it possible to listen to audio ...

  3. What to know about Medicare and hospital at home programs - AOL

    www.aol.com/finance/know-medicare-hospital-home...

    For people with Medicare, the out-of-pocket cost for hospital at home is generally the same as for receiving similar care in a hospital. Increasingly, says Rami Karjian, the founder and CEO of ...

  4. When Does Medicare Cover Second Opinions? - AOL

    www.aol.com/lifestyle/does-medicare-cover-second...

    Medicare will provide coverage when you need that second opinion. You’ll be covered as long as the second opinion is about a service that Medicare covers. You’ll pay 20% of the cost when you ...

  5. These Anti-Snoring Devices Can Help You (and Your Partner ...

    www.aol.com/lifestyle/anti-snoring-devices-help...

    The Smart Nora is an anti-snoring system that uses a pillow insert and a monitoring device to cut back on snoring. The Pebble is a wired controller that sits on your nightstand, and it listens for ...

  6. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    Active noise control ( ANC ), also known as noise cancellation ( NC ), or active noise reduction ( ANR ), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. The concept was first developed in the late 1930s; later developmental work that began in the 1950s eventually resulted in ...

  7. Hearing protection device - Wikipedia

    en.wikipedia.org/wiki/Hearing_protection_device

    A hearing protection device, also known as a HPD, is an ear protection device worn in or over the ears while exposed to hazardous noise and provide hearing protection to help prevent noise-induced hearing loss. HPDs reduce the level of the noise entering the ear. HPDs can also protect against other effects of noise exposure such as tinnitus and ...

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