Active noise control

(redirected from Active noise reduction)
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Active noise control

Electronic masking of sound to cover unwanted or intrusive sound, such as speech or equipment noise.
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Caption: Figure 14: Method of active noise reduction. (a) Block diagram of ANR.
There is no active noise reduction for protection from steady state noise, but the tight fitting and well-sealed gel ear cups provide maximum passive attenuation.
Like Narce, Silynx provides combined hearing protection and enhancement systems via its Micro C40PS 20-metre immersible, software-defined headset which has a built-in GPS for blue force tracking and active noise reduction. Its sibling product, the C400PS Hybrid Headset Configuration is designed for use in very noisy environments while, as its name suggests, the C40PS Maritime Headset Configuration can withstand immersion in 20 metres of water and manages sound leakage as its communications are inaudible from a range of 20 inches.
The on-board multicore VoIP processor delivers 590 MIPS of computational power with industry-leading power consumption figures, according to the company, and integrates stereo analog codecs and a stereo Class D amplifier with 48 kHz support, which along with Dialog's acoustic echo cancellation and active noise reduction, are asserted to give best-in-class audio quality for crystal-clear voice conversation.
Industrial workers often use "earmuff" type hearing protection, and some fields now even use advanced technologies like active noise reduction or noise cancellation, in which electronic circuits blunt the impact of noise.
Features of the Saab 340Bplus aircraft include seating for 34 passengers overhead bins, an active noise reduction system and on-board lavatories.
Sennheiser, Embraer Sennheiser reached an agreement with Embraer to provide its Sennheiser HMEC 26 active noise reduction headsets for Phenom and E-Jet aircraft.
IT MEANS A SNUG FIT ON THE HEAD AND EARS GIVES YOU PASSIVE NOISE REDUCTION, AND THE ELECTRONICS GIVE YOU ACTIVE NOISE REDUCTION.
Their topics include spiral curvilinear orthogonal coordinates in the context of aerodynamics, linear and nonlinear analysis for optimal pursuit in space, applying multi-variate methods for controlling and estimating satellite flexible parameters, an analytical description of the three-dimensional swing-by, a predictor-tunnel display for precision flight-path control, active noise reduction in an aircraft cabin, the non-Markovian approach to valuating and hedging European contingent claims on power with spikes of Pareto distributed magnitude, and orbital transfer maneuvers propulsed by low thrust.
As shown in the figure, there is a progression of capability, starting from what has been used on the flight deck for decades up through active noise reduction (ANR), deep-insert, custom communication earplugs worn under improved earmuffs and used with a digital noise-canceling microphone.
The NoiseBuster Active Noise Reduction Safety Earmuff from Pro Tech Communications is designed to eliminate noise from a wide range of frequencies.
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