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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 ...
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 ...
Diver clearing ears Section of the human ear, the Eustachian tube is shown in colour. Ear clearing, clearing the ears or equalization is any of various maneuvers to equalize the pressure in the middle ear with the outside pressure, by letting air enter along the Eustachian tubes, as this does not always happen automatically when the pressure in the middle ear is lower than the outside pressure.
Aircraft emergency oxygen systems or air masks are emergency equipment fitted to pressurized commercial aircraft, intended for use when the cabin pressurisation system has failed and the cabin altitude has climbed above a safe level. It consists of a number of individual yellow oxygen masks stored in compartments near passenger seats and near ...
They can cause an airplane to stall,” Byrnes said. “At a high altitude that is more forgiving. At a low altitude, that is very unforgiving. There’s no room to recover.”. That’s part of ...
In-flight entertainment. In-flight entertainment (IFE) refers to entertainment and other value-added services available to aircraft passengers during a flight. Frequently managed by content service providers, the types of in-flight entertainment and their content vary significantly based on the airline, aircraft type, and geographic region.
He tells me that aside from demanding he goes on vacation, his friends demand he write a tell-all book about his years brushing against superstardom at their most intimate and vulnerable moments.
Mechanisms of sound pollution. Aircraft noise is noise pollution produced by an aircraft or its components, whether on the ground while parked such as auxiliary power units, while taxiing, on run-up from propeller and jet exhaust, during takeoff, underneath and lateral to departure and arrival paths, over-flying while en route, or during landing.
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