Why do I hear so many planes?

The influence of atmospheric conditions The degree to which people experience aircraft noise on the ground has a lot to do with atmospheric conditions. Temperature, wind speed and direction, humidity, rain and cloud-cover all have a part to play in the way we hear aircraft noise.



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Although uncommon, military flights can be approved during quiet hours based on mission requirements. WHY DO I SEE MILITARY AIRCRAFT FLYING AT NIGHT? 115th Fighter Wing pilots and crews are required to train at night to maintain readiness and all-weather capabilities.

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Why do some airplanes sound so much louder than others when they pass overhead? Engine type, altitude, and humidity are the three biggest reasons. (A jet with afterburners is louder than anything else). Jet engines especially are much quieter now than they used to be.

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Aircraft noise at high levels can be considered a stressor on the body, and research has found an association between high levels of aircraft noise and an increased risk of developing Cardiovascular disease (CVD).

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A loud bang and a shudder on the runway might indicate a blown tyre, a potentially serious problem. A sound like an engine backfiring, while flying relatively close to the ground, could suggest a bird strike.

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The reverberation of sound waves caused by weather may make noise seem louder than it actually is. Common factors responsible for this phenomenon include: variations in air temperature; wind speed and direction; humidity and precipitation.

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The influence of atmospheric conditions Temperature, wind speed and direction, humidity, rain and cloud-cover all have a part to play in the way we hear aircraft noise. The reverberation of sound waves caused by the weather can make noises seem louder.

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Night flying restrictions or night-time curfews, including night flight bans, are any regulations or legislation imposed by a governing body to limit the ground-perceived exposure to aircraft noise pollution during the night hours, when the majority of residents are trying to sleep.

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During the day, when the air is warmer than the ground, noise energy from an airplane staying in the air, so while you can still hear it, it seems quieter. Conversely, at night, when the ground is warmer than the air, the noise is drawn down, making it seem louder.

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An altitude of 500 feet above the surface, except over open water or sparsely populated areas. In those cases, the aircraft may not be operated closer than 500 feet to any person, vessel, vehicle, or structure.

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For most flyers, blood clots and getting sick are the big things to worry about. Meanwhile, for most people, the immediate health risks of flying should be considered more than any long-term problems. These include blood clotting — a risk that increases up to fourfold for long-haul flights.

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Over the past 50 years, aircraft have reduced their noise output by 75% and this progress continues. Today's aircraft entering service have on average, a noise footprint that is 30-50% that of the aircraft they are replacing thanks to new engine and airframe design and technology.

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How to Know If You Live Under a Flight Path. Before you rent or buy a new home, you can check out a few websites and apps to find out if you live under a flight path. With FlightStats you can track flights by airport, whereas FlightAware Flight Tracker clues you into private planes as well.

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Take off requires much more thrust than level flight at steady speed. In order to accelerate the aeroplane, the engine throttles are at a very high setting on take off, which means you get the most noise.

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Air traffic represents less than 2-3% of the global CO2 emissions whereas road traffic accounts for around 10% of these direct emissions. Still, planes remain among the most polluting means of transport, together with cars.

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If the noise of flights passing overhead is unbearable and you're able to do some repairs on your home, you may also consider getting some noise-canceling curtains, insulating your windows and doors and filling in any sound gaps that may help quiet your environment.

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