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2. Earplug - Wikipedia

   en.wikipedia.org/wiki/Earplug

   Ray and Cecilia Benner invented the first moldable pure silicone ear plug in 1962. These earplugs were valued by swimmers because of their waterproof qualities, as well as those trying to avoid harmful noise. Ray Benner, who was a Classical musician, bought McKeon Products in 1962.

3. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Simplified graphical depiction of active noise reduction. To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control or ANC.A microphone captures the targeted ambient sounds, and a small amplifier generates sound waves that are exactly out of phase with the undesired sounds.

4. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Circumaural headphones have large pads that surround the outer ear. Circumaural headphones (sometimes called full size headphones or over-ear headphones) have circular or ellipsoid earpads that encompass the ears. Because these headphones completely surround the ear, circumaural headphones can be designed to fully seal against the head to ...

5. Dog communication - Wikipedia

   en.wikipedia.org/wiki/Dog_communication

   A drawing by Konrad Lorenz showing facial expressions of a dog – a communication behavior. y-axis = fear, x-axis = aggression. Both humans and dogs are characterized by complex social lives with complex communication systems, but it is also possible that dogs, perhaps because of their reliance on humans for food, have evolved specialized skills for recognizing and interpreting human social ...

6. Fall-Loving Labrador’s Most Epic Leaf Pile Moments ... - AOL

   www.aol.com/fall-loving-labrador-most-epic...

   In the same way kids love hopping into a big, crunchy pile of leaves to catch their fall, dogs do, too. Likewise, the scents of the leaves trigger a dog's sensory system. If the leaves fell off of ...

7. Bluetooth - Wikipedia

   en.wikipedia.org/wiki/Bluetooth

   The Headset Profile (HSP) connects headphones and earbuds to a cell phone or laptop. The Health Device Profile (HDP) can connect a cell phone to a digital thermometer or heart rate detector. The Video Distribution Profile (VDP) sends a video stream from a video camera to a TV screen or a recording device.

8. Dynamic Doberman Duo Hits All the Right Notes with ... - AOL

   www.aol.com/dynamic-doberman-duo-hits-notes...

   Hey, they sound great — and anyone who says otherwise simply has no ear for real music, Commenters seem to agree with me there, and some even pointed out that their Dobermans at home tend to ...

9. 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.