That noise has been there all along.  I've always heard it as long as the sim is up and running  I hit quit to desktop and it kind of wound down to nothing. I used to think it was the fan in the computer.

Funny thing happened while testing.  At first I tried the Cessna 172 at  Charlotte (KCLT) which is a large airport and shut the engine off and still heard it.  So I figured it was other airplane noise,

So I went to a rural grass strip where there was no background noise and shut everything down.  The noise was still there, so it's not a particular plane, it's the sim itself.

The funny thing that I didn't expect was I could hear frogs croaking continually.

Roy

AM I GOING CRAZY?

HELP!!! Get me out of this freakin' cockpit!

 

6 hours ago, NismoRR said:

Just heard it in the Kodiak at KTEX. No traffic mods installed. 

 

4 hours ago, Farlis said:

This kind of bug will affect ALL AI Traffic, no matter where it comes from.

So...is this noise even being generated by AI traffic?

I experienced this noise for the first time last night only after updating to SU8.  I assumed (wrongly?) that Asobo had enabled other aspects of Legacy sounds from previous sim iterations.  This noise reminded me of the jet startup sound associated with AI.

I went to great lengths in FSX to disable AI sounds heard in the cockpit, as it was just unrealistic.  In the sound.cfg of AI planes there is a line viewpoint=1, which indicates that the sound will be heard in the cockpit. I thought possibly they had finally activated this parameter in the sim, as indicated by the most recent SDK documentation.

Unfortunately,  they have not yet enabled the parameter for disabling certain legacy sounds in the sim, being controlled by the flag=1 line, which was very useful for tweaking/troubleshooting. 

Weird thing is, tonight I few same AC out of the same airport (YUL-YYZ) and didn't hear the vaccum sound with 100% AIG loaded.  Exterior view sounds were just fine.

 

18 minutes ago, irocx said:

So...is this noise even being generated by AI traffic?

I believe it is. The noise appeared for me the moment I noticed the lights of another aircraft appearing off to one side in the distance. The noise even seemed to play in stereo from that side. Plus, by turning the Other Aircraft sound slider to zero in the sounds menu resolves the issue. Of course then you get no AI sounds at all.

Go fly around a busy airport like Heathrow and it is a cacophony of these vacuum cleaners.

Edited March 2, 20224 yr by RaptyrOne

5 minutes ago, RaptyrOne said:

I believe it is.

I'm with you, I believe it is too, but was pleasantly surprised not to have been annoyed by it this evening.  

Another interesting note is that 2 other important parameters have not been enabled to allow developers to control the volume of legacy AI sounds.  Could be interesting if mystery sound is, in fact, coming from AI. 

Another way to mitigage the problem is to switch "Headphone Simulation" on.

 

I found that it got switched off. I used it since MSFS was released, since I feel the sounds of the engine inside of the aircraft sound much more convincing if I simulate wearing headphones this way.

This also turns down the volume of the faulty outside noises.

12 hours ago, Roy Warren said:

That noise has been there all along.  I've always heard it as long as the sim is up and running  I hit quit to desktop and it kind of wound down to nothing. I used to think it was the fan in the computer.

For me the problem only started to appear in the SU8 beta. I would certainly have noticed it if it was present earlier.
SU8 comes with a few changes in audio which might have introduced or at least exacerbated the issue.

I only noticed the problem from SU8 beta onwards, and the issue goes away when I close AIG Traffic program (or whatever its called), that doesn't mean its an AIG issue though - I'm not saying that, could be a general AI traffic issue instead.

On 2/28/2022 at 9:00 PM, Starlifter60 said:

Just updated to SU8 and now in several aircraft (stock and aftermarket) there is this strange random noise that sounds like a vacuum cleaner inside the cockpit. Starts off loud then "spools down" and then goes away form a few minutes then repeats. Has anyone else heard this or is it time for me to regret the questionable chemical choices I made decades ago? 🙄

I seem to have this, yet funny enough I never noticed it in the SU8 beta. I flew in the sim last night and noticed it almost straight away, so there must be some difference between the Beta and full release of SU8.

Maybe you're hearing something I'm not hearing.  What I hear is no way as loud as a vacuum cleaner.  It's more like a small fan.

Mine reads 50 db on my cell phone app. My vacuum cleaner is 79 dbs.

Roy

Edited March 2, 20224 yr by Roy Warren

I was not in the SU8 Beta but this noise was definitely not present for me prior to SU8. It is loud and obnoxious, intolerable even, just like that vacuum cleaner video above. No way I missed it before. It is reportedly present with AIG and default traffic, pointing towards another Asobo induced bug.

I’ll play with the different audio output options in the Sim Sounds Menu tonight and see if any of these make a difference. We know these sound options caused problems in the initial SU8 Beta, so Asobo was definitely fiddling there.

Edited March 2, 20224 yr by RaptyrOne

On 2/28/2022 at 10:02 PM, RALF9636 said:

I experience the same, in any aircraft. It happens midair with no other aircraft in immediate vicinity. The sounds disappear immediately when setting AI traffic to zero.

It's not an adequate sound of another aicraft passing by being played too loud. It sounds more like an engine spool up sound you would expect to hear on the apron.

Thanks for the link. Voted.

How could that pass the Beta test?

I didn't encounter it in the Beta, yet in the full release I've experienced it almost straight away, so maybe it isn't affecting everyone.

I've been getting this too. I've just swapped out the AIG flies in the community folder for Aerosoft Simple Traffic and the jet noises have gone. I don't think it's a bug with MSFS.

EDIT. But there again I've just got a small 16mb sim patch,  Maybe a hot fix?

 

Edited March 2, 20224 yr by jarmstro

What's a vacuum cleaner?  

36 minutes ago, jarmstro said:

I've been getting this too. I've just swapped out the AIG flies in the community folder for Aerosoft Simple Traffic and the jet noises have gone. I don't think it's a bug with MSFS.

EDIT. But there again I've just got a small 16mb sim patch,  Maybe a hot fix?

 

I have never heard this but I use Simple Traffic.