I've got dry pipes on my tiger so overall noise I wasn't too worried about. I was more wondering if that high pitch squeel hurts your ears or if the phone recordings make it sound worse.....

Does not hurt the ears at all

The high pitch you hear is intake noise and most of the boats turbine marine rigged had flaps that closed the intakes to the engine compartment for idling around marinas. That makes a huge difference in sound level…

Fortunate to get a ride in the left m60 gunner position on.this Huey. The birthpiece of most Marine Turbines??

I'm going to say you're wrong and sadly once the hearing loss appears, maybe years later, there's no recovery.

Typically what is turbine fuel consumption?

A turbine is thirsty at ground idle(not counting the fire show ) it is also loudest then it goes super duper thirsty at full power but it is also its quietest totally backwards from piston engines a few guys here can put a fuel burn chart up its interesting, the noise is loudest at idle because thecompressor case has openings that open to let some compressed air out so as not to blow the flame out. as more fuel is sprayed in for a bigger fire in the burner cans it can now take the extra air and the bleed bands close up and force all the air through the engine half the air is for cooling and half gets burned i believe. the very old T53 1950s tech has a low compression ratio i think its 6 or 7 to 1 modern turbines with advanced composite blades are over 50-1 in the 40s they figured out how to make the power turbine or hot section so they used 3 of them on the huge radial engines of the day they were connected to the crank and added 400 hp each it took another 10 years to figure out making the compresser section with hollow blades with cooling holes to keep it from overheating and melting those old engines are really cool to see hear and study we were much farther advanced than most realize!

I always used 3 gallons per mile or .33MPG as a safe estimate. Long on plane trips without a lot of no wake zones it was way better than that, but i always used that number to be safe.

Incorrect but entitled to your own opinion. Just don't try and state them as facts that apply to all.