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2. Hearing protection device - Wikipedia

   en.wikipedia.org/wiki/Hearing_protection_device

   In some occasions, multiple types of ear protection can be used together to increase the NRR. For example, foam earplugs can be worn in-conjunction with earmuffs. Each type of ear protection has what is called a noise reduction rating (NRR). This gives the consumer an estimate of how much noise is being reduced before reaching the individual's ear.

3. Earmuffs - Wikipedia

   en.wikipedia.org/wiki/Earmuffs

   Active earmuffs have an electronic component and microphones that allow the user to control their access to communication while attenuating background noise. When in loud, hazardous settings, the wearer may still be required to listen to outside sources, such as machinery work, their supervisor's commands, or talk to their colleagues.

4. Earplug - Wikipedia

   en.wikipedia.org/wiki/Earplug

   Using both ear muffs (whether passive or active) and earplugs simultaneously results in maximum protection, but the efficacy of such combined protection relative to preventing permanent ear damage is inconclusive, with evidence indicating that a combined noise reduction ratio (NRR) of only 36 dB (C-weighted) is the maximum possible using ear ...

5. The 9 best rechargeable hearing aids, according to hearing ...

   www.aol.com/lifestyle/best-rechargeable-hearing...

   The greatly increased competition between prescription and OTC hearing aid manufacturers has led to improved technologies like Bluetooth connectivity, fully invisible hearing aids or discreet ...

6. Electronic fluency device - Wikipedia

   en.wikipedia.org/wiki/Electronic_fluency_device

   Electronic fluency devices (also known as assistive devices, electronic aids, altered auditory feedback devices and altered feedback devices) are electronic devices intended to improve the fluency of persons who stutter. Most electronic fluency devices change the sound of the user's voice in his or her ear.

7. Google pulls McDonald's negative reviews over arrest in ...

   www.aol.com/news/google-pulls-mcdonalds-negative...

   Google on Monday removed derogatory reviews about McDonald's after the suspect in the killing of UnitedHealth executive Brian Thompson was arrested at its restaurant in Altoona, Pennsylvania ...