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  2. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    Active noise canceling is best suited for low frequencies. For higher frequencies, the spacing requirements for free space and zone of silence techniques become prohibitive. In acoustic cavity and duct-based systems, the number of nodes grows rapidly with increasing frequency, which quickly makes active noise control techniques unmanageable.

  3. Active sound design - Wikipedia

    en.wikipedia.org/wiki/Active_sound_design

    Active noise cancelling (ANC) is a software process that uses existing in-vehicle infotainment hardware to eliminate undesirable noise within the interior of a vehicle. This elimination technique is known as harmonic order reduction, where unwanted audio signals are identified by sensors and filtered out of the overall interior vehicle sound. [3]

  4. Are Noise-Canceling Headphones Harmful to Your Ears? - AOL

    www.aol.com/noise-canceling-headphones-harmful...

    Active noise cancellation is generally effective, but some frequencies or sounds are easier to counteract than others. A prime example is steady-state or low-frequency noise as it is relatively ...

  5. The best wireless headphones for seniors in 2025 - AOL

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

    Active Noise Canceling (ANC): The hot headphone feature of the 21st century is active noise canceling, otherwise known as ANC. Flip a switch (or press a button) and the earpieces magically reduce ...

  6. General Dynamics Ajax - Wikipedia

    en.wikipedia.org/wiki/General_Dynamics_Ajax

    This was delayed due to design and testing problems. Test crews were required to wear noise cancelling headphones and be checked for hearing loss at the end of operations and the vehicles were unable to reverse over obstacles more than 20 centimeters high. [24]

  7. Best noise-canceling headphones, according to Consumer ... - AOL

    www.aol.com/news/best-noise-canceling-headphones...

    Sennheiser PXC 550-II $289.99 at Amazon. Sennheiser PXC 550-II $299.99 at Walmart. True Wireless Sony WF-1000XM4. The WF-1000XM4 is the latest in Sony’s line of noise-canceling true wireless ...

  8. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Both passive isolating and active noise-cancellation headphones or earplugs help to achieve a reduction of ambient sounds, which is particularly helpful for people suffering from insomnia or other sleeping disorders, for whom sounds such as cars honking and snoring impact their ability to sleep. For that reason, noise-cancelling sleep ...

  9. All of these Black Friday deals would make very good gifts - AOL

    www.aol.com/lifestyle/all-of-these-black-friday...

    Released just this year, they come with more features than you may expect given their tiny package: active noise cancellation, transparency mode, USB-C charging and a snug, customizable fit.

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