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  2. Hearing protection device - Wikipedia

    en.wikipedia.org/wiki/Hearing_protection_device

    Earmuffs, external: This ear protection fits snug around the person's external ear. Earplugs, internal: These are ear protection that fit inside of the person's ear canal. There are many different types of ear plugs. The most commonly known are foam, musician, or custom earplugs that are made from a mold of a person's ear.

  3. Earplug - Wikipedia

    en.wikipedia.org/wiki/Earplug

    This infection's symptoms include: itchiness, redness, swelling, pain upon tugging of the pinna, or drainage. To protect from this form of infection, it is important to thoroughly dry the ears after exposing them to water with a towel. To protect the ears during exposure, the individual can use a head cap, ear plugs, or custom-fitted swim molds ...

  4. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Without power, some models do not function as regular headphones. Any battery and additional electronics may increase the size and weight of the headphones compared to regular headphones. The noise-cancelling circuitry may reduce audio quality and add high-frequency hiss, although reducing the noise may result in higher perceived audio quality ...

  5. These are the 6 most important stock market charts technical ...

    www.aol.com/6-most-important-stock-market...

    Investors are focused on the potential extension of the stock market's bull rally heading into 2025. Wall Street experts highlighted the most important stock market charts to watch into next year.

  6. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    The wavelength in air of sinusoidal noise at approximately 800 Hz is double the distance of the average person's left ear to the right ear; [1] such a noise coming directly from the front will be easily reduced by an active system but coming from the side will tend to cancel at one ear while being reinforced at the other, making the noise ...

  7. 2024 has been a nerve-wracking year for plane travel. How ...

    www.aol.com/2024-nerve-wracking-plane-travel...

    Anxious airline flyers may well remember 2024 as the year their worst fears about the safety of air travel felt confirmed, as a series of unprecedented, and in some cases fatal, airplane incidents ...

  8. The 9 Best Sale Items at Costco Right Now - AOL

    www.aol.com/9-best-sale-items-costco-200246923.html

    Peanut butter is a pantry staple in my house, and if it is in yours, too, now’s the time to stock up. Jif and Skippy are offering a two-pack of 48-ounce jars for $3.30 off.

  9. In-flight entertainment - Wikipedia

    en.wikipedia.org/wiki/In-flight_entertainment

    Today, in-flight entertainment is available on almost all wide body aircraft, and often excluded from narrow body aircraft, largely due to aircraft storage and weight limits. The Boeing 757 was the first narrow body aircraft to widely feature both audio and video in-flight entertainment. Most Boeing 757s feature ceiling-mounted CRT screens ...

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