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2. 8 Headphones You Can Comfortably Wear to Sleep - AOL

   www.aol.com/8-headphones-comfortably-wear-sleep...

   Ahead, eight versions of sleep headphones that are doing it best, depending on your sleep and ear needs. Download a 12-hour long brown noise playlist and call it a night. Sleep Headphones

3. I'm a Light Sleeper, and I Swear By These Modern ... - AOL

   www.aol.com/im-light-sleeper-swear-modern...

   I especially appreciate that they came with multiple ear tip sizes, making it easy to create an ideal fit without pinching a large foam plug and hoping for the best. The Quiet earplugs are also ...

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

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

   Experts discuss earplugs for sleeping including the best earplugs, if earplugs are safe for sleeping, the best earplug materials, and more. The Very Best Earplugs for Sleeping, According to Sleep ...

5. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Noise-cancelling headphones are headphones that suppress unwanted ambient sounds using active noise control (ANC). Active noise cancellation makes it possible to listen to audio content without raising the volume excessively. In an aviation environment, noise-cancelling headphones increase the signal-to-noise ratio significantly more than ...

6. Crystal earpiece - Wikipedia

   en.wikipedia.org/wiki/Crystal_earpiece

   Crystal earpieces are usually monaural devices with very low sound fidelity, but high sensitivity and impedance. Their peak use was probably with 1960s era transistor radios and hearing aids. They are not used with modern portable media players due to unacceptable sound quality. The main causes of poor performance with these earpieces are low ...

7. 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 ...