SPL of a T-Rex 600N w/ OS 50 Hyper?

[TheBum]

Does anybody know the maximum sound pressure level of a T-Rex 600N w/ OS 50 Hyper and a typical muffler? The field where I fly has a limit of 96 dB @ 3 yards. I don't think the heli would be that loud, but I want to be sure.

[george0079]

I'd be curious to know what it is for the MP5 50, and the Align pipe. The Align pipe is loud when compared to the MP5

[Pinecone]

Which orientation (left side, right side, front, back, underneath)? What power level (idle or hover or max)?

Lots of variables.

BTW part of my profession is sound and sound level measurements. :)

[TheBum]

Which orientation (left side, right side, front, back, underneath)?
Whichever is loudest. :)

What power level (idle or hover or max)?
I said "maximum", didn't I? ;)

[Pinecone]

No, maximum means highest allowable for certain conditions. It could be the maximum allowed at Idle, or maximum allowed at Hover, etc. :)

And so how do you maintain 3 yards from a helicopter and full throttle? Personal lift? :)