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2. Earplug - Wikipedia

   en.wikipedia.org/wiki/Earplug

   Earplug. 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. Since they reduce the sound volume, earplugs may prevent hearing loss and tinnitus (ringing of the ears), in some cases.

3. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Some in-ear headphones utilize built-in microphones to allow some outside sound to be heard when desired. [42] [43] Generic or custom-fitting ear canal plugs are made from silicone rubber, elastomer, or foam. Such plugs in lower-end devices may be interchangeable, which increases the risk of them falling off and getting lodged in the ear canal.

4. The 7 Best Wireless Surround Sound Systems for an ... - AOL

   www.aol.com/lifestyle/best-wireless-surround...

   Best for Audio Fanatics: Nakamichi Shockwafe Elite. Best Theater Sound: Sony HT-A7000. Best Value: VIZIO M-Series 5.1. Best Upgrade For A Wired System: Samsung GW-Q990C. Affordable Low-Cord ...

5. 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. HPDs can also protect against other effects of noise exposure such as tinnitus and ...

6. Plasticine - Wikipedia

   en.wikipedia.org/wiki/Plasticine

   Harbutt. Country. United Kingdom. Availability. 1900–. Plasticine is a putty -like modelling material made from calcium salts, petroleum jelly and aliphatic acids. Though originally a brand name for the British version of the product, it is now applied generically in English as a product category to other formulations.

7. Electrical connector - Wikipedia

   en.wikipedia.org/wiki/Electrical_connector

   AC power plugs are also commonly circular, for example, Schuko plugs and IEC 60309. NMEA 2000 cabling using M12 connectors. The M12 connector, specified in IEC 61076-2-101, is a circular electrical plug/receptacle pair with 12mm OD mating threads, used in NMEA 2000, DeviceNet, IO-Link, some kinds of Industrial Ethernet, etc.