Probably the exhaust valve, just in from the passenger exhaust tip, can't miss it. There's no other engine sound anything that I know of.

 

Hope Volvo never goes down the path of speaker generated engine/exhaust sounds. It's awful

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Since it is seen as safety feature given engine noise may be an alert to pedestrians and others not in the (soundless) car, I would imagine it is right up Volvo's alley to put them on their cars...

 

I don’t think it needs one for pedestrians since the supercharger is so loud :-D but I’m sure the PHEV uses one when in electric mode.

Will check the exhaust flap controller out.

 

It's on the driver side, right behind the front bumper. There's a speaker there on the frame. I'll take a picture of it when I see that wrecked V60 again.

 

I'm thinkin' it's item 22 below.

 

The V90 has a valve too?

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Well the actuator on the passenger side exhaust is plugged in. It went from open key on engine off to closed on cold startup. Will have to check how it reacts when revving later. Unless there’s a different part setting the code. Doubt it has a noise maker on the front bumper as this is not the T8.

 

Doubt it has a noise maker on the front bumper as this is not the T8.

Seems that this is only present on T8.

 

There are a couple features in this car for engine sound. I'm not familair with the exterior sound I don't have a PHEV model it's only on those.

These cars DO have ANC "Active Noise Control" i.e. Volvo term for fake engine noise. I don't know exactly how the system works as far the ECM, I have seen that code before but I am puzzled why there would need to be "circuits" when this could all run off the data networks in the car. The stereo amp is integrated into it, the noise is played through the stereo speakers.

Becuase I can, I disabled the ANC in my car, and I love it. The ANC was excessive to me and sounded strange, at least now that I can compare without it. Car is quieter now and sounds more like a normal 4 banger. You can just barely hear a little bit of the turbo now too and a little more of the exhaust.

 

Are you sure that's not a system to make the cabin quieter if it's coming through the stereo speakers?

 

That could be a function of it, I beleive ANC is also connected to, or monitoring, the interior microphones. It definitely adds engine noise though. There are 2 subfunctions when it is enabled "Engine Order Enhancement" and "Engine Order Reduction" EOE and EOR. The setting are Off, EOE, EOR, EOE+EOR. The T6 comes from the factory with EOE. Since I have played with it, I was curious about what the settings do, I tried the EOR and EOE+EOR settings as well. Those just made funky noise come through the speakers. I discovered that the EOR setting, I beleive is only for diesel models.

Since changing it to Off, it's very obvious the additional engine noise is gone, no doubt about it. You might not otherwise know if you don't have that comparison. On relfecting it does make sense, the firewall is like any modern premium car, insulated very well. road noise and engine noise are well controlled. You block out all the "bad" noise and you don't have much engine feedback, so they add back in with the ANC. Seems a little excessive to me, not really necessary.

If there is any noise cancellation, I can't tell the difference between ANC on and off.

 

That could be a function of it, I beleive ANC is also connected to, or monitoring, the interior microphones. It definitely adds engine noise though. There are 2 subfunctions when it is enabled "Engine Order Enhancement" and "Engine Order Reduction" EOE and EOR. The setting are Off, EOE, EOR, EOE+EOR. The T6 comes from the factory with EOE. Since I have played with it, I was curious about what the settings do, I tried the EOR and EOE+EOR settings as well. Those just made funky noise come through the speakers. I discovered that the EOR setting, I beleive is only for diesel models.

Since changing it to Off, it's very obvious the additional engine noise is gone, no doubt about it. You might not otherwise know if you don't have that comparison. On relfecting it does make sense, the firewall is like any modern premium car, insulated very well. road noise and engine noise are well controlled. You block out all the "bad" noise and you don't have much engine feedback, so they add back in with the ANC. Seems a little excessive to me, not really necessary.

If there is any noise cancellation, I can't tell the difference between ANC on and off.

Interesting.

Engine "Order" suggests it is related to engine rpm, so it makes sense that EOEnhancement adds some of the "good" engine sounds to the cabin via the sound system (e.g., Vroom Vroom).

People do prefer a bit of engine "presence" (the NVH guys word for engine noise), but too much is bad. Perhaps that's why they want to quiet the diesels down a bit.

As mentioned in a earlier post somewhere, my GTI had a tube that connected the intake manifold to the firewall. It's sole purpose was to add engine "presence" to the cabin in a somewhat natural, analog way.

 

From my limited experience, engines with gasoline direct injection (GDI), like our Volvos, all make a sort of "puttering' sound at idle, much like a modern diesel. I ascribe this to either the sharper, diesel-like combustion of a GDI engine or the high-pressure fuel pump itself.

On a related note, I recently picked up a BMW i4 electric vehicle. It is full of fake noises. There are speakers fore and aft that emit vacuum-cleaner-like, speed-sensitive sounds that are there to warn pedestrians. In the cabin, you get a sound track composed by Hans Zimmer, grammy-winning composer, that reacts to speed and load. It is reminiscent of what you'd hear in a 1950's sci-fi movie. You can turn it off. The vehicle is eerily silent then, which is probably why they felt the need to create it. I leave it on.

 

I don't know that the "ANC system" does? The cabin mics are connected to the IHU right? It's hard to tell with these software systems, there are no components dedicated to the ANC system alone it's all connected hardware and software in the car. The mics are used for bluetooth calling, and I believe also used for the feature of the stereo that compensates the volume for road noise and speed. I have downloaded all the "function descriptions" from VIDA, at least what is listed under my 2019 S60, I don't believe there is any mention of noise cancellation in there. There are no data fields for noise cancellation to read from the IHU or AUD. Those are just the clues I have seen that lead me to beleive it's not a system in the car, of course I can always be wrong!

 

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Ahh thanks buddy, it seems there is a feedback system there from the mics. Now from experience...I tried enabling EOR with my T6, just from observation, it seemed to add sound rather than reduce any engine noise, and some weird sound at that ;-). So that did give me the idea that there is some specific tuning for this for the drivetrain, something missing for the T6. And perhaps, since this is for the hybrids (and diesels for Europe) it's not focused on the frequencies that are meaningful for the petrol motor anyways. I'm interested in the apparent results if anyone else tries this. Looks like this is focused on drvietrain sound, in my mind it would be great to have noise cancellaton for wind and tire noise at speed!

 

I suspect this is not what I hear because

And to me, it sounds like it comes from the right front...

 

Hi,
Can anyone tell us how to disable engine sound through speakers completely?