3 ms·
For that, the pressure waves (sound) coming from the engines would have to be somewhat coherent, or correlated in phase. Since what we're hearing is essentially
by nicemountain 1y ago
For that, the pressure waves (sound) coming from the engines would have to be somewhat coherent, or correlated in phase. Since what we're hearing is essentially turbulence, that's not going to be the case.
- jeffbee 1y agoEngines in modern aircraft are phase-locked, though.
- mrob 1y agoThe majority of the engine noise is caused by the turbulent mixing of the exhaust with the surrounding air. Turbulence is chaotic, so even if the engines are phase locked the sound rapidly becomes incoherent.
- Toutouxc 1y agoDo you have a source for that? I’ve heard about something that some twin-props have, but definitely not jets. The engines don’t even run at the same RPM.
- jeffbee 1y agohttps://www.osti.gov/biblio/6356085 https://www.osti.gov/biblio/6356085 It is what the "Sync" switch on the panel does.
- Toutouxc 1y agoYes, but it seems like no turbofan synchrophaser systems have been implemented yet. Only on turboprops. https://aviation.stackexchange.com/questions/71738/is-engine-sync-to-avoid-beat-frequencies-also-a-concern-for-jet-engines https://aviation.stackexchange.com/questions/71738/is-engine...
- deleted 1y ago[deleted]