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2. Earplug - Wikipedia

   en.wikipedia.org/wiki/Earplug

   Earplugs are also available which help to protect ears from the pain caused by airplane cabin pressure changes. Some products contain a porous ceramic insert which reportedly aids equalization of air pressure between the middle and outer ear thereby preventing pain during landings and take-offs.

3. List of aviation headset connectors - Wikipedia

   en.wikipedia.org/wiki/List_of_aviation_headset...

   XLR 5, used internally on Airbus aircraft [9] [1] REDEL 6-pin connector by LEMO, known as "LEMO plugs". [10] [1] Most Cirrus aircraft use this connector. [9] Fischer 8-pin connector, used in Agusta helicopters [5] Neutrik neutriCON 8-pin connector [11] [12] [13] The XLR, LEMO and Fischer plugs are able to supply power for active noise ...

4. 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.

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

   www.aol.com/lifestyle/very-best-earplugs...

   For premium support please call: 800-290-4726 more ways to reach us

6. Unique Travel Accessories For A Stress-Free Vacation - AOL

   www.aol.com/lifestyle/unique-travel-accessories...

   For premium support please call: 800-290-4726 more ways to reach us

7. Cabin pressurization - Wikipedia

   en.wikipedia.org/wiki/Cabin_pressurization

   An airliner fuselage, such as this Boeing 737, forms an almost cylindrical pressure vessel.. Cabin pressurization is a process in which conditioned air is pumped into the cabin of an aircraft or spacecraft in order to create a safe and comfortable environment for humans flying at high altitudes.

8. Why do my ears feel clogged? 5 Things you can do right now. - AOL

   www.aol.com/why-ears-feel-clogged-5-000000206.html

   You may hear a squeak or popping sound as the air pressure equalizes. Fluid in the Ear The most common cause of fluid in the ear is an infection, but it can also be caused by other medical conditions.

9. Hearing protection fit-testing - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_fit-testing

   Hearing protection devices such as earplugs or earmuffs must be worn correctly for the wearer to be protected from noise. [4] Correct use of hearing protection includes: Choosing the most appropriate hearing protection device, both with appropriate level of attenuation and appropriate fit for the individual. [ 5 ]