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System Design: Mysterious Noises Re-Visited - Aviation Today
https://www.aviationtoday.com/2013/01/01/system-design-mysterious-noises-re-visited/#:~:text=Most%20unexpected%20and%20objectionable%20to%20the%20flight%20crew,noise%20thorns%20in%20your%20headset%20in%20every%20flight.
Aircraft Noise - Fly Quiet OAK
https://flyquietoak.com/sites/default/files/documents/2018-06/aircraft_noise_fundamentals.pdf
The normal audible frequency for young adults is 20 Hz to 20,000 Hz. Community noise, including aircraft and motor vehicles, typically ranges between 50 Hz and 5,000 Hz. The human ear is not equally sensitive to all frequencies, with some frequencies judged to be louder for a given signal than others. See Figure 6.2.
Why Tolerate Radio Noise - Experimental Aircraft …
https://www.eaa.org/eaa/aircraft-building/BuilderResources/while-youre-building/building-articles/instruments-and-avionics/why-tolerate-radio-noise
Perhaps the most common contributor to aircraft radio noise is the ignition system. Naturally, if you do not intend to use an onboard radio, you don’t have to worry about ignition noise. And you don’t have to worry about installing a shielded ignition system complete with expensive aircraft type shielded spark plugs and harnesses.
CHAPTER Audio Systems - Aircraft Spruce
https://www.aircraftspruce.com/catalog/pdf/13-01643.pdf
Noise in its practical form is an annoying squeal, pop, snap, or whine coming from the speakers or headsets. Aside from indicating filter failure or power supply problems, it can affect the pilot’s ability Audio Systems 163 5054ch06.qxd_cc 3/14/01 11:32 AM Page 163
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