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2. 9 Waterproof Earbuds for Everything From Swimming to ... - AOL

   www.aol.com/9-best-waterproof-headphones...

   For whichever sweaty, water-logged places you find yourself, here are the 9 best waterproof earbuds and headphones—with MP3 storage, Bluetooth, or both.

3. Hearing range - Wikipedia

   en.wikipedia.org/wiki/Hearing_range

   Hearing range describes the frequency range that can be heard by humans or other animals, though it can also refer to the range of levels. The human range is commonly given as 20 to 20,000 Hz, although there is considerable variation between individuals, especially at high frequencies, and a gradual loss of sensitivity to higher frequencies ...

4. Take 20% Off Raycon Earbuds, Headphones and Speakers ... - AOL

   www.aol.com/entertainment/20-off-raycon-earbuds...

   Raycon has an amazing selection of best selling earbuds, headphones and more which rival the most popular brands — but best of all, they’re significantly less expensive. And right now, you can ...

5. Hearing protection device - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_device

   Sound levels of some daily activities. 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 ...

6. Labrador Retriever Listens So Intently When His Little Human ...

   www.aol.com/labrador-retriever-listens-intently...

   The dog even shook her head when the girl was finished. "She said no!" she exclaimed to her mom as she turned. "She shaked her head no like this," the little girl added. People in the comments ...

7. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Noise -cancelling headphones alongside a carry case. Noise-cancelling headphones are headphones which suppress unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing . Noise cancellation makes it possible to listen to audio ...