DIY fake exhaust tone

[onobeka]

No, I do not. Only MY2019 get those. And yes, I would turn it off too if it was a petrol engine. Not with a 4cyl diesel, where there’s a lot o pinging noise, rattles and grinding especially when the engine it’s cold. I drove Ranger Raptors and Thunders, the 2.0 diesel is even worse than the 2.2 yet better than the 3.2 in terms of harshness. I have already deadened a few panels, based on sound localization measurements I’ve done with directional microphones. The firewall is the culprit on the Rangers and that’s very hard to deaden without a full engine or dashboard removal.

Probably most of you think of my idea in terms of loud and show-off, while I’ve never mentioned this, quite the contrary. Low cyl diesels are notorious for high pitch sounds, I want to somewhat color that sound with some lower tones. It can also be an in-cabin project in the end, however it would be extremely difficult to compose the tone as the inside noise has virtually no transfer path except air while the engine has lots of it. Probably also the reason many of tou think the fake engine sound in your speakers is unpleasant.

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[D Fresh]

No, I do not. Only MY2019 get those. And yes, I would turn it off too if it was a petrol engine. Not with a 4cyl diesel, where there’s a lot o pinging noise, rattles and grinding especially when the engine it’s cold. I drove Ranger Raptors and Thunders, the 2.0 diesel is even worse than the 2.2 yet better than the 3.2 in terms of harshness. I have already deadened a few panels, based on sound localization measurements I’ve done with directional microphones. The firewall is the culprit on the Rangers and that’s very hard to deaden without a full engine or dashboard removal.

Probably most of you think of my idea in terms of loud and show-off, while I’ve never mentioned this, quite the contrary. Low cyl diesels are notorious for high pitch sounds, I want to somewhat color that sound with some lower tones. It can also be an in-cabin project in the end, however it would be extremely difficult to compose the tone as the inside noise has virtually no transfer path except air while the engine has lots of it. Probably also the reason many of tou think the fake engine sound in your speakers is unpleasant.

The fact that you want to put a speaker in your engine compartment, and maybe want to attach said speaker to your engine, in order to quiet in cabin noise tells me this project is doomed from the start.


Just trade out of the diesel or turn the tunes up if you hate the sound that much.

 

[NotBudule]

No, I do not. Only MY2019 get those. And yes, I would turn it off too if it was a petrol engine. Not with a 4cyl diesel, where there’s a lot o pinging noise, rattles and grinding especially when the engine it’s cold. I drove Ranger Raptors and Thunders, the 2.0 diesel is even worse than the 2.2 yet better than the 3.2 in terms of harshness. I have already deadened a few panels, based on sound localization measurements I’ve done with directional microphones. The firewall is the culprit on the Rangers and that’s very hard to deaden without a full engine or dashboard removal.

Probably most of you think of my idea in terms of loud and show-off, while I’ve never mentioned this, quite the contrary. Low cyl diesels are notorious for high pitch sounds, I want to somewhat color that sound with some lower tones. It can also be an in-cabin project in the end, however it would be extremely difficult to compose the tone as the inside noise has virtually no transfer path except air while the engine has lots of it. Probably also the reason many of tou think the fake engine sound in your speakers is unpleasant.

I mostly misunderstood, you just want to kinda trade noises around , not necessarily make everyone know about it , diesel are "mechanical " sounding to say the least ... my apologies sir !

 

[onobeka]

Indeed, thank you all who responded constructively and also to the others who were concerned. It’s good to have concerns about annoying others, I have them too.

Here are a few thoughts that I’ve been running so far:

1) Arduino choice: I am experienced with them, made many home automation devices so far, my own CNC and teaching to students in university. Also I want an instant response, from the moment I turn the ignition or a switch. I can read analog and digital on these boards. There are versions that also have a DAC, so output wav quality is good.

2) OBD reader for Tacho. It will be hard to interface on the Arduino and also the OBD port is hot. An ELM327 always connected can drain a battery in two days.

3) I thought of noise cancelling initially, but I do not have enough clocks and memory to run a windowed FFT on the Arduino to depict the frequencies I want to phase out.

4) Similar to 3) I cannot run a microphone to convert the tone of the engine into RPM, I need something stronger. A Raspberry PI could do that but it boots way too slow.

5) I could run a temperature loop and turn of the algorithm once the engine is warm. The tone of the 4c diesel is decent afterwards.

6) I’ll need a 6.5” low range driver, probably marine series in a ported enclosure. I can tune the samples that way too.

7) I think I will not increase the volume, just the sampling frequency of the replay. I need a 720deg sample recorded at idle, as this is a 4cyl engine. The engine will get louder with RPM but that’s probably ok. If not I can manipulate the volume as well. I need to measure the dB of the stock car noise and tune the output to that. Same level, more frequency content. Hopefully it will be a linear curve, the throttle pedal measurement would be enough in that case.

8) Obviously I need to run this off a relay, a small amplifier too.

9) I will go through a ton of iterations to get it right .

10) I will probably fail many times .

 

[Msfitoy]

 

[onobeka]

That is what I am afraid of being imposed on EVs soon .

 

[NotBudule]

EV 's might actually thin the herd somewhat so that's another environmental win for 'lectric...

 

[mtbikernate]

I vote for fart noises, cows mooing, goats/sheep screaming, etc.



Ah, to get one of those screaming sheep every time you punch the accelerator

and fart noises when you coast

 

[got3fords]

Soon, when we will all move to EVs, we all shall have fake sounds outside cars for pedestrians and blinds sake. .

The electric grid is not ready for everyone to move to EV's. They are already warning about brown outs and black outs in CA and big cities. The load on the grid is getting to be too much. And since they mostly fossil fuels to make electricity we're screwed.

 

[onobeka]

The electric grid is not ready for everyone to move to EV's. They are already warning about brown outs and black outs in CA and big cities. The load on the grid is getting to be too much. And since they mostly fossil fuels to make electricity we're screwed.

We will ALL move to EVs sooner or later. VAG is bound to slash all combustion engines in 2035. EVs are really dangerous for pedestrians in low speed situations, one cannot hear them coming from behind. They will make noise otherwise it will be carnage. Anyway, I know this for a fact .

 

[HDA]

I say go for it, bud. To each his own. Do keep us updated.

 

[Grumpaw]

The electric grid is not ready for everyone to move to EV's. They are already warning about brown outs and black outs in CA and big cities. The load on the grid is getting to be too much. And since they mostly fossil fuels to make electricity we're screwed.

Yeah...out in the country of Caley Forn E A if more than 6 EV plug in for a charge, the whole area goes "brown out".

 

[onobeka]

I say go for it, bud. To each his own. Do keep us updated.

Will do that for sure. I think of this as an open source project by a community. Once again I am grateful for you guys having me. Tomorrow I am a birthday boy, otherwise I would dismantle that pedal .

 

[onobeka]

Yeah...out in the country of Caley Forn E A if more than 6 EV plug in for a charge, the whole area goes "brown out".

The grids will upgrade. Don’t worry about it. They need to sustain all the solar panels you and me will have on the roofs anyway now or later. Will it be a zero sum game, maybe. Soon you’ll be able to sell electricity at your gate for EVs. I know many projects of that sort, and it’s a smart idea, less dumping in the networks, avoiding peaks, overfeeding a so-so network is also an issue not only drain overload.

 

[Grumpaw]

I'm not worrying at all...solar is great, but here, like many places, everyone wants a solar farm, as long as it's somewhere NOT around their home.
I figure I'll be 6 feet under by the time everyone comes to their senses and does what needs to be done.

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