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  2. A Neurologist Explains Why You Can’t Get That Song Out of ...

    www.aol.com/neurologist-explains-why-t-song...

    An earworm happens when you have the “inability to dislodge a song and prevent it from repeating itself” in your head, explains Steven Gordon, M.D ., neurologist at UC Health and assistant ...

  3. The Sun is really loud — but if we could hear it ... - AOL

    www.aol.com/article/news/2018/02/26/the-sun-is...

    The Sun is said to be extremely noisy, but we can’t hear it since sound doesn’t travel through space. Scientists at the University of Sheffield decided to use vibrations within our star's ...

  4. 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 ...

  5. The 9 best rechargeable hearing aids, according to hearing ...

    www.aol.com/lifestyle/best-rechargeable-hearing...

    Quick Overview. Starkey Genesis AI RIC. Best rechargeable prescription hearing aid. $2,000 – $6000 at Starkey. Jabra Enhance Select 300. The best OTC rechargeable hearing aid. $1,595 – $1,795 ...

  6. Phonophobia - Wikipedia

    en.wikipedia.org/wiki/Phonophobia

    Phonophobia. Phonophobia, also called ligyrophobia or sonophobia, is a fear of or aversion to loud sounds (for example firecrackers)—a type of specific phobia. [2] It is a very rare phobia which is often the symptom of hyperacusis. Sonophobia can refer to the hypersensitivity of a patient to sound and can be part of the diagnosis of a migraine .

  7. If a tree falls in a forest and no one is around to hear it ...

    en.wikipedia.org/wiki/If_a_tree_falls_in_a_forest...

    The tree will make a sound, even if nobody heard it, simply because it could have been heard. The answer to this question depends on the definition of sound. We can define sound as our perception of air vibrations. Therefore, sound does not exist if we do not hear it. When a tree falls, the motion disturbs the air and sends off air waves.

  8. Take 20% Off Raycon Earbuds, Headphones and Speakers ... - AOL

    www.aol.com/entertainment/20-off-raycon-earbuds...

    These Basic Earbuds. The Work Earbuds Classic. Raycon. For everyday wear that’s easy to take in and out, these buds are the perfect pick! See it! Get The Work Earbuds Classic (originally $120 ...

  9. Loudspeaker - Wikipedia

    en.wikipedia.org/wiki/Loudspeaker

    To make sound, a loudspeaker is driven by modulated electric current (produced by an amplifier) that passes through a speaker coil which then (through inductance) creates a magnetic field around the coil. The electric current variations that pass through the speaker are thus converted to a varying magnetic field, whose interaction with the ...