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2. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Noise control is an active or passive means of reducing sound emissions, often for personal comfort, environmental considerations, or legal compliance. Active noise control is sound reduction using a power source. Passive noise control is sound reduction by noise-isolating materials such as insulation, sound-absorbing tiles, or a muffler rather ...

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

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   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 ...

4. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   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 passive noise attenuating headphones or no headphones, making hearing important information such as safety announcements easier. [ 1 ] Noise-cancelling headphones can ...

5. Comparison of free software for audio - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_free...

   This comparison of free software for audio lists notable free and open source software for use by sound engineers, audio producers, and those involved in sound recording and reproduction.

6. Dolby noise-reduction system - Wikipedia

   en.wikipedia.org/wiki/Dolby_noise-reduction_system

   Dolby noise reduction is a form of dynamic pre-emphasis employed during recording, plus a form of dynamic de-emphasis used during playback, which work in tandem to improve the signal-to-noise ratio. The signal-to-noise ratio is simply how large the music signal is compared to the low level of tape noise with no signal.

7. High fidelity - Wikipedia

   en.wikipedia.org/wiki/High_fidelity

   High fidelity (often shortened to Hi-Fi or HiFi) is the high-quality reproduction of sound. [1] It is popular with audiophiles and home audio enthusiasts. Ideally, high-fidelity equipment has inaudible noise and distortion, and a flat (neutral, uncolored) frequency response within the human hearing range. [2] High fidelity contrasts with the lower-quality "lo-fi" sound produced by inexpensive ...