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  2. Are Noise-Canceling Headphones Harmful to Your Ears? - AOL

    www.aol.com/noise-canceling-headphones-harmful...

    The good news is that noise-canceling headphones can benefit your ears in certain situations. A few of those situations could be blocking out background noise in a busy coffee shop, blaring ...

  3. Safe listening - Wikipedia

    en.wikipedia.org/wiki/Safe_listening

    Make Listening Safe is promoting the development of features in PLS to raise the users' awareness of risky listening practices. In this context, the WHO partnered with the International Telecommunication Union to develop suitable exposure limits for inclusion in the voluntary H.870 safety standards on "Guidelines for safe listening devices/systems."

  4. 30 Security Measures That Everyone Should Take Far More ... - AOL

    www.aol.com/more-people-54-security-measures...

    Image credits: GenealogyLover #9. Stop walking on the wrong side of the road. You walk *against* traffic, you bike *with* it. And don’t do it side by side. And don’t do it with headphones in ...

  5. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Simplified graphical depiction of active noise reduction. To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control.A microphone captures the targeted ambient sounds, and a small amplifier generates sound waves that are exactly out of phase with the undesired sounds.

  6. Headphones - Wikipedia

    en.wikipedia.org/wiki/Headphones

    Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby ...

  7. Having trouble hearing your TV? These genius headphones - AOL

    www.aol.com/entertainment/having-trouble-hearing...

    The headphones use special hearing-aid technology to boost voices while minimizing unwanted background noise — and shoppers are hooked. Says a fan: "The sound is so clear! Best earphones I have ...

  8. Best noise-canceling headphones, according to Consumer ... - AOL

    www.aol.com/news/best-noise-canceling-headphones...

    Sennheiser PXC 550-II $289.99 at Amazon. Sennheiser PXC 550-II $299.99 at Walmart. True Wireless Sony WF-1000XM4. The WF-1000XM4 is the latest in Sony’s line of noise-canceling true wireless ...

  9. Head-related transfer function - Wikipedia

    en.wikipedia.org/wiki/Head-related_transfer_function

    HRTF filtering effect. A head-related transfer function (HRTF) is a response that characterizes how an ear receives a sound from a point in space. As sound strikes the listener, the size and shape of the head, ears, ear canal, density of the head, size and shape of nasal and oral cavities, all transform the sound and affect how it is perceived, boosting some frequencies and attenuating others.

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