Questions tagged [noise-reduction]
Questions about reducing the impact of aircraft noise, either by reducing the amount of noise generated, changing aircraft flightpaths so that more of the noise is generated farther away from anyone who might complain, or both.
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What type of engine sound suppressors are used in general aviation?
Today we were discussing about noise pollution and why aircraft engines considered one of the biggest contributors to producing high intensity sound and I thought are there any ways and/or methods ...
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What are the differences, if any, between aviation custom earplug and regular custom sleeping or musician earplugs?
I see some websites selling aviation custom earplugs. What are the differences, if any, between aviation custom earplugs and regular custom sleeping or custom musician earplugs (i.e., flat-response ...
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How would flying into Frankfurt a.M. Airport be problematic for the Tu-154?
A friend of the family lives in the approach path of Frankfurt a.M. Airport (FRA, EDDF). Until a few years ago, Tupolev Tu-154s were still flying to this airport, although as I understand, they don't ...
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What were the rules about night flights from LHR in the 80s?
I was just reading a question over on movies.SE: How could Ryan land in New York in early morning?, and the accepted answer suggests that Jack Ryan's plane takes off from LHR at about 4am.
One of the ...
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How did the Blackops 'quiet one' helicopter muffler work?
Back in the Vietnam War era, special ops needed a quiet means of inserting soldiers behind enemy lines to install eavesdropping equipment. They modified a Hughes 500 to do the job. One of the things ...
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The principle in 'Trompe' is applied to airplanes?
'Trompe' (see Wikipedia) is a water-powered air compressor, commonly used before the advent of the electric-powered compressor. A trompe is somewhat like an airlift pump working in reverse, used to ...
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Is engine sync to avoid beat frequencies also a concern for jet engines?
Is synchronization of rpm to avoid beat frequencies also a concern on jet engine aircraft like it is on propeller driven airplanes?
Context:
This question on SE-Aviation discusses prop sync for ...
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What is the loud noise of a helicopter when the rotors are not yet moving?
What is the loud noise when a helicopter is ready to start flying, but the rotor is not yet rotating?
For example at Trump's "chopper talk", when he is intercepted by reporters on the way to Marine ...
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Why don't modern jet engines use forced exhaust mixing?
Jet engines are noisy[citation needed] - even a modern high-bypass turbofan is still deafeningly loud compared to pretty much anything except the even-louder low-bypass turbofans or a turbojet (much ...
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Is ear protection necessary for General Aviation aircraft?
What would happen if someone flew a brand new Cessna Skylane/Caravan or a Robinson R22 without using earplugs or headphones? Would they get hearing damage or it would be just a little bit loud where ...
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What is the cabin noise hertz in typical commercial aircrafts?
In cabin, we hear noises in commercial aircrafts. Wondering if it is in general over or under 100 hz. There should be a band width. Thanks!
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How does the X-59 achieve low-noise supersonic flight?
By what mechanism or combination of mechanisms does the X-59 reduce the noise produced by its sonic boom? What are the design choices that led to this outcome? I really want to understand the issue ...
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Using ANR aviation headset with a PC
I just started my studies towards PPL, and am looking into buying a good ANR aviation headset for flying on Cessna 172.
I have an office job, and I'm dealing with a lot of noise, hence ideally I'd ...
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How (and when) does Heathrow alternate arrival paths?
I've noticed that flights over Richmond (particularly arrivals) seem to have significantly reduced over the last few weeks. This is based on looking at Flightradar, as well as listening to the noise ...
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Aerospike nose cones for supersonic jets?
Not to be confused with aerospike nozzles. This is about the big pin-like rod in front of ICBM nose cones.
This answer (from Space) about aerospike nose cones notes that one of the potential ...
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