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The EgyptAir Boeing 777 was parked at gate F7 of Terminal 3 at Cairo airport on 29 July 2011, with preparations underway to operate flight 667. As the last few of the 307 passengers were boarding, the flight crew in the cockpit heard a bang and a hissing sound coming from the right side console, immediately followed by smoke and flames.
The hissing of high voltage transmission lines is due to corona discharge, not magnetism. The phenomenon is also called audible magnetic noise, [1] electromagnetic acoustic noise, lamination vibration [2] or electromagnetically induced acoustic noise, [3] or more rarely, electrical noise, [4] or "coil noise
The Hum is a name often given to widespread reports of a persistent and invasive low-frequency humming, rumbling, or droning noise audible to many but not all people. Hums have been reported all over the world, including the United States, the United Kingdom, Australia and Canada.
Hiss or Hissing may refer to: Hiss (electromagnetic), a wave generated in the plasma of the Earth's ionosphere or magnetosphere; Hiss (surname) Hissing, a Korean manhwa series by Kang EunYoung; Noise (electronics) or electronic circuit hiss, white noise present at low level in all electronic circuits
For example, when making a p sound, the lips come together tightly, blocking the air momentarily and causing a buildup of air pressure. The lips then release suddenly, causing a burst of sound. The place of articulation of this sound is therefore called bilabial, and the manner is called stop (also known as a plosive).
An air handler is usually a large metal box containing a blower, furnace or A/C elements, filter racks or chambers, sound attenuators, and dampers. [2] Air handlers usually connect to a ductwork ventilation system that distributes the conditioned air through the building and returns it to the AHU, sometimes exhausting air to the atmosphere and ...
The sound simply emanates from a grate over a steam vent. [4] Neuhaus stated it is intended for the sound to be "plausible", dismissed as an "unusual machinery sound from below ground" [ 4 ] and to be overlooked repeatedly until it is discovered by the viewer in a serendipitous way.
Such a signal is heard by the human ear as a hissing sound, resembling the /h/ sound in a sustained aspiration. On the other hand, the sh sound /ʃ/ in ash is a colored noise because it has a formant structure. In music and acoustics, the term white noise may be used for any signal that has a similar hissing sound.
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