For GA aircraft .... The FR172 we used to operate attracted quite a bit of adverse comment regarding noise, the Cessna 337 has two of the same engines and props ... so logically that has to be pretty close to top of the list..

Lightning , not GA.! Is so too Genuinely Awesome.!! Well was.

Ditto with a 4 Vulcan scramble, again 16 Olympus.

Sorry Guy's either the DHC-2 Beaver or DHC-3 Otter at 05:30 on a lake with inhabitants......

Has to be the Conquest when it’s facing you! 🙀

MU-2 no doubt

I definitely second that !!!!

Ask the folk on Anglesey about noisy aircraft, I think they would be unanimous in the Texans.

May have been until recently the Dominie T1 (HS125 200 Series). Two Vipers in close formation made a hell of a noise. In recent years we were theoretically banned from many European civilian airports. We were often asked for our Noise Certificate? The Dominie noise was never certified at any level apart from "Very Noisy"
We talked our way into many places such as Milan Linate and Paris Le Bourget but very rarely welcome back until their memory faded as to how many noise complaints we generated.
All that noise for just over 6000lbs of thrust!!!

That's not noise, that's music :ok:

Banned from some airfields
 

The Cessna 337 was no covert creeper, but had double skin windows for the occupants.
The 300hp Islander was a close second, but EVERYONE knew when a 337 took off, however it was a fun machine that in Robertson STOL mode handled like a fighter and performed very well.

A 185 with a two bladed prop certainly gets your attention.

tdracer, yes, the P&W music emanating from a DC3 is surely not noise!

A 185 with a 3 blade 86" isn't very quiet on a cold morning.

M1M what have you started :ok:

In my sheltered GA existence I found from a very far distance away the Navajos and Chieftains to be injurious to everyones ears during the start of their take-off roll.

Also found the whiney racket caused by the tail rotors of early model B407s and A109s to be totally unnecessary.

An engine backfire in a tired old PA28 that was about to fall apart around you was character building.

Parked plenty of MU-2s but Paris Jet gets my vote.

The meat-bombing Airvan that claws for altitude all weekend over my area before it spews out its organic lawn darts.

The one that is begin complained about is always the loudest, true story, often it is a helicopter thou

Off 11 at Toowoomba in RUU or FWG at 06:00 got the whole city's attention.

CAC Boomerang would would out scream anything.

A-26 Invader. A pair of R-2800's, climb power, in a dive, low...and over!!! Yea baby!!!

A song in the heavens! Funny thing, sitting in the back of a DC-3 in these old airline seats, legroom galore, reclined for sleep... those P&W's just burbling along, lulling you to dreamland!