[email protected] said: > We deal with big fans all the time, viz. Turboprop engines running at up to > 2000rpm. Generates nasty massive spurs below 100hz.
2000 / 60 is 33.333 Hz One man's noise is another man's signal. (Or something like that. I think I picked it up here, ages ago.) How hard is it to measure the RPM of the engine if I give you the signal from an airplane? (If they want to find you, the radar signal is readily available. R^4th is ugly.) -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
