User:Johan G/Synthesising sounds with Audacity
By synthesising sounds with Audacity, a free and open source audio editing software, one can add aircraft sounds that are relatively close to real sounds when (good) GNU GPL compatible sounds are hard to come by.
A word on decibels
Some tips when listening
The basic tools
Check sampling frequency!
Effect > Normalize... > x Remove dc offset, x max amplitude -3 dB > Preview > OK
Analyze > Plot Spectrum...
Note dB axis!
Creating noise tracks
Generate > Noise... > White, 0.6, 5—10 seconds
Synthesising sound with FFT filter and white noise
Draw, listen and compare, rinse and repeat.
Wosh, buffeting, mechanical vibrations, note about controlling Reynolds number with sound
Combustion, heat and turbulence
RPM, vibrations and overtones
Wosh, Brrrr, klonk
Sound in the cockpit
Fighter cockpits: 80—110 dB(A)
Attenuation in a flight helmet
Unwanted sound in analysed recordings
- Kuronen, Pentti (2004). Military aviation noise – Noise-induced hearing impairment and noise protection (pdf). Published by Oulu University Press. Archived from the original on June 3, 2020. Retrieved Aug 26, 2020.