madman
Very interesting table, well done. Would recommend anyone having a look. Noise is a big issue and will of course become more so. Anyone know what the meaning of the right hand Noise Limit column is - assuming the Noise Level is the actual measured?
No surprises that the B205 tops the table on overflight noise at 97.8dB, compared with around 84 for a B206, 87 for a AS350 and 90 for an A109.
From AS350/355 seems number of engines makes no difference, which is no great surprise, though interesting the Arrius 355N slightly quieter than Allison F at 36.7. NOTAR 900 at 83.5 just quieter than fenestron 135. PT6 S76 quite a bit noisier than Arriel at 95 c/w 93 - is that subjectively reckoned to be the case?