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2. The Very Best Earplugs for Sleeping, According to Sleep ... - AOL

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3. Do Loop earplugs actually work?

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   Loop’s highest decibel earplug is the Loop Quiet; if you’re looking for something stronger with better noise reduction, consider Mack’s soft foam earplugs $10, which have 33 decibels SNR or ...

4. Earplug - Wikipedia

   en.wikipedia.org/wiki/Earplug

   Pre-molded earplugs (left), formable earplugs (center), and roll-down foam earplugs (right) An earplug is a device that is inserted in the ear canal to protect the user's ears from loud noises, intrusion of water, foreign bodies, dust or excessive wind.

5. 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.

6. Best and worst bedtimes for various generations - AOL

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   Various generations need different amounts of sleep to function properly. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in ...

7. Crystal radio - Wikipedia

   en.wikipedia.org/wiki/Crystal_radio

   Crystal earphones are designed as ear buds that plug directly into the ear canal of the wearer, coupling the sound more efficiently to the eardrum. Their resistance is much higher (typically megohms) so they do not greatly "load" the tuned circuit, allowing increased selectivity of the receiver.

8. Ear-EEG - Wikipedia

   en.wikipedia.org/wiki/Ear-EEG

   Ear-EEG is a method for measuring dynamics of brain activity through the minute voltage changes observable on the skin, typically by placing electrodes on the scalp. In ear-EEG, the electrodes are exclusively placed in or around the outer ear, resulting in both a much greater invisibility and wearer mobility compared to full scalp electroencephalography (EEG), but also significantly reduced ...

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