03-09-2012, 08:57 PM
(03-09-2012, 08:50 PM)robair Wrote: G'day All
It may not be applicable to assign a straight db maximum?
Different aircraft make different frequencies of sound, the psychoacoustal brigade will argue that a large 3d aircraft gnashing its prop at 70db is going to be a lot less offensive then a low blade high speed edf at the same db to the ears of our field neighbours.
Cheers
Rob B
This is true also high frequency sound energy is attenuated more easily than that of lower frequency.
“The knack of flying is learning how to throw your machine at the ground and miss.”
"When once you have tasted flight, you will forever walk the earth with your thoughts turned skyward, for there you have been, and there you will always long to return." ~Leonardo Da Vinci