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Bose wants to apply noise canceling in cars
Not really PC relates, but this sparked my attention. Bose has been around for years with Active noise cancellation, especially in headphones. In a bit of a new concept, Bose now wants to apply noise canceling in cars.
Bose supplies audio systems to many car manufacturers. They will release a QuietComfort Road Noise Control, short for RNC. The technology is already available. Unpleasant road noises will be minimized. Bose does this by placing various microphones and accelerometers in the cabin. This allows an algorithm to measure vibrations that cause the sounds. The technology is combined with other Bose techniques that reduce the engine noise in vehicles with a combustion engine. The system is also available without Bose audio system.
Here’s how the company describes the new tech in a press release:
“Accelerometers mounted on the vehicle body enable a Bose algorithm to continuously measure vibrations that create noise. This information is then used to calculate an acoustic cancellation signal, which is delivered through the vehicle’s speakers to reduce the targeted noise. Microphones placed inside the cabinmonitor residual noise levels, allowing the system to adapt the control signal for optimized performance over different road surfaces, while automatically adjusting over time as the vehicle ages.”
The company says the tech, which builds upon and combines with the existing Engine Harmonic Cancellation (EHC) and Bose Engine Harmonic Enhancement (EHE) for reducing engine noise, will begin appearing in cars in 2021.
airbud7
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Senior Member
Posts: 7835
Joined: 2011-07-20
#5626445 Posted on: 01/11/2019 04:21 PM
Can it block out my significant other one week per month?
Can it block out my significant other one week per month?
schmidtbag
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Posts: 6838
Joined: 2012-11-10
#5626447 Posted on: 01/11/2019 04:22 PM
I think it's only meant to remove road, engine, and wind noise, nothing else.
Also, notice how they mentioned it would make stuff like in-car phone conversations easier. If it could cancel out all frequencies, then you would be muted (which, in a technological perspective, sounds fascinating).
It's worth pointing out that active noise cancellation in general doesn't work well when the sound changes too much. This is mostly because of how slow the speed of sound is. So for example if another car was honking at you, you're always going to hear at least a tiny bit of that because for a brief moment, you and the audio processor are hearing that sound at the same time. Once the algorithm figures out the counter-wave, that's when the sound would be silenced. But since a siren typically has a fluctuating sound, I don't think it could be entirely silenced.
Putting a bit of a twist on what you said there:
Although active noise cancellation is pretty cool, it isn't hard to drown out road, engine, and wind noise with music. You don't even have to turn the volume up that high.
That being said, I never understood why so many car reviewers make such a big fuss about such noise. Sure, a quieter cabin is always nice, but how many people commute in total silence?
Wouldn't this...theoretically, be an issue with police/emergency vehicles?
I think it's only meant to remove road, engine, and wind noise, nothing else.
Also, notice how they mentioned it would make stuff like in-car phone conversations easier. If it could cancel out all frequencies, then you would be muted (which, in a technological perspective, sounds fascinating).
It's worth pointing out that active noise cancellation in general doesn't work well when the sound changes too much. This is mostly because of how slow the speed of sound is. So for example if another car was honking at you, you're always going to hear at least a tiny bit of that because for a brief moment, you and the audio processor are hearing that sound at the same time. Once the algorithm figures out the counter-wave, that's when the sound would be silenced. But since a siren typically has a fluctuating sound, I don't think it could be entirely silenced.
Again, i get someone can have their music so loud they can't hear any of it anyways, but to actually have a technology inside your vehicle to make certain you don't, just seems....counter-productive, unless all vehicles go driverless and you don't have to pay attention to audio ques on the roadways
Putting a bit of a twist on what you said there:
Although active noise cancellation is pretty cool, it isn't hard to drown out road, engine, and wind noise with music. You don't even have to turn the volume up that high.
That being said, I never understood why so many car reviewers make such a big fuss about such noise. Sure, a quieter cabin is always nice, but how many people commute in total silence?
schmidtbag
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Posts: 6838
Joined: 2012-11-10
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Posts: 6838
Joined: 2012-11-10
#5626449 Posted on: 01/11/2019 04:23 PM
Your car should already have the technology for that - just sit in the drivers seat, roll up the windows, lock the doors, and crank up the volume.
EDIT:
If that's not enough, press the "panic" button on the remote to make them go away.
Can it block out my significant other one week per month?
Your car should already have the technology for that - just sit in the drivers seat, roll up the windows, lock the doors, and crank up the volume.
EDIT:
If that's not enough, press the "panic" button on the remote to make them go away.
Agent-A01
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Joined: 2010-12-27
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Posts: 11592
Joined: 2010-12-27
#5626485 Posted on: 01/11/2019 05:41 PM
Wouldn't this...theoretically, be an issue with police/emergency vehicles?
I'm not sure there's specifically a law that you must be able to hear the vehicles if their sirens are on, and there's obviously a visual aspect to the vehicles that you should be paying attention to, i'm just envisioning an era with all noise-canceling vehicles making the sirens of emergency vehicles moot point aside from a pedestrian point of view (...and then, there's noise canceling headphones already, so....)
And then, as well, honking becomes moot point i guess too?
Again, i get someone can have their music so loud they can't hear any of it anyways, but to actually have a technology inside your vehicle to make certain you don't, just seems....counter-productive, unless all vehicles go driverless and you don't have to pay attention to audio ques on the roadways
Unless the noise cancellation is targeting specific noises, rather then all ambient noises, like the article, kinda, sorta, implies, but doesn't also specifically say it doesn't...
There's no law that pertains to blocking noise from outside the vehicle.
As for this technology, high end cards already do this.
Example, S class mercedes has double-pane windows and lots of sound isolation.
Loud noises outside are hard to hear.
Wouldn't this...theoretically, be an issue with police/emergency vehicles?
I'm not sure there's specifically a law that you must be able to hear the vehicles if their sirens are on, and there's obviously a visual aspect to the vehicles that you should be paying attention to, i'm just envisioning an era with all noise-canceling vehicles making the sirens of emergency vehicles moot point aside from a pedestrian point of view (...and then, there's noise canceling headphones already, so....)
And then, as well, honking becomes moot point i guess too?
Again, i get someone can have their music so loud they can't hear any of it anyways, but to actually have a technology inside your vehicle to make certain you don't, just seems....counter-productive, unless all vehicles go driverless and you don't have to pay attention to audio ques on the roadways
Unless the noise cancellation is targeting specific noises, rather then all ambient noises, like the article, kinda, sorta, implies, but doesn't also specifically say it doesn't...
There's no law that pertains to blocking noise from outside the vehicle.
As for this technology, high end cards already do this.
Example, S class mercedes has double-pane windows and lots of sound isolation.
Loud noises outside are hard to hear.
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They are.
https://electrek.co/2019/01/10/tesla-model-3-safer-noise-machine/
https://electrek.co/2018/02/27/electric-automakers-quiet-noise-devices-pedestrian-accidents/