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2. Best Noise-Cancelling Headphones: Here’s Where To Get Bose ...

   www.aol.com/lifestyle/best-noise-cancelling...

   They feature an over-the-ear design to physically block out background noise, while Sony’s powerful HD Noise-Cancelling Processor QN1 chip works with their built-in eight-microphone setup to ...

3. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Active noise control (ANC), also known as noise cancellation (NC), or active noise reduction (ANR), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. The concept was first developed in the late 1930s; later developmental work that began in the 1950s eventually resulted in ...

4. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Noise-cancelling headphones are headphones that suppress unwanted ambient sounds using active noise control (ANC). 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 ...

5. How Active Noise Canceling (ANC) Headphones Work - AOL

   www.aol.com/active-noise-canceling-anc...

   Noise cancellation can help reduce the volume level without sacrificing sound quality or straining to hear over the noise." So, in short, noise cancellation itself is safe. But ANC isn't a free ...

6. Health effects from noise - Wikipedia

   en.wikipedia.org/wiki/Health_effects_from_noise

   Elevated workplace or environmental noise can cause hearing impairment, tinnitus, hypertension, ischemic heart disease, annoyance, and sleep disturbance. [3][4] Changes in the immune system and birth defects have been also attributed to noise exposure. [5] Although age-related health effects (presbycusis) occur naturally with age, [6] in many ...

7. How noise cancelling headphones work - AOL

   www.aol.com/news/noise-cancelling-headphones...

   Their active noise cancelling is not as powerful as higher-end choices — in my tests, they did a decent job blocking out low-pitched drones, but people talking were a bit more audible than on ...