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2. Trouble hearing your TV? These 'crystal-clear' wireless ... - AOL

   www.aol.com/lifestyle/cant-hear-tv-genius...

   The Avantree Ensemble focuses on clarity, automatically balancing audio levels so that even those that are hard of hearing can make out what's being said on screen. And if you're worried about the ...

3. Assistive listening device - Wikipedia

   en.wikipedia.org/wiki/Assistive_Listening_Device

   A common usage is to aid people who are hard of hearing (HOH) by amplification and providing a better signal to noise ratio (SNR). The ALD may be used to help HOH people hear televisions [1] and other audio devices, [2] or to help people hear speech through public address or sound reinforcement systems, such as in places of worship or lectures.

4. Having trouble hearing your TV? These genius headphones - AOL

   www.aol.com/entertainment/having-trouble-hearing...

   The headphones use special hearing-aid technology to boost voices while minimizing unwanted background noise — and shoppers are hooked. Says a fan: "The sound is so clear! Best earphones I have ...

5. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Active noise-cancelling headphones use a microphone, amplifier, and speaker to pick up, amplify, and play ambient noise in phase-reversed form; this to some extent cancels out unwanted noise from the environment without affecting the desired sound source, which is not picked up and reversed by the microphone. They require a power source ...

6. The best wireless headphones for seniors - AOL

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

   Sony WH-CH720N Noise-Cancelling Wireless Headphones. Best Sony XM5 headphones alternative. $98 at Walmart. Earbuds are easily lost, too, but just try misplacing a full-size headphone. Below I've ...

7. Absolute threshold of hearing - Wikipedia

   en.wikipedia.org/wiki/Absolute_threshold_of_hearing

   Absolute threshold of hearing. The absolute threshold of hearing ( ATH ), also known as the absolute hearing threshold or auditory threshold, is the minimum sound level of a pure tone that an average human ear with normal hearing can hear with no other sound present. The absolute threshold relates to the sound that can just be heard by the ...