By Safet Satara Dec 18 2021 - 9:06am
The latest software update for the newest versions of the Model S and Model X, called 2021.44.5, introduced us to a new feature - the Active Road Noise Reduction. If you have the latest Model S or the X, you can access it in the Audio Settings.
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What does Tesla say about its Active Road Noise Reduction feature?
The Active Road Noise Reduction effectively reduces low-frequency road noise by "creating quiet zones near headrests". The feature is available only on the top-notch versions of the Model S and the Model X SUV. After a recent interior upgrade, these cars already have all the necessary hardware installed inside.
Some have already tested the feature and found that it is still somewhat subtle yet noticeable. Official Tesla explanation found on the list of improvements after the update says this:
"Your vehicle now has the ability to actively reduce low-frequency road noise while driving on rough surfaces. To accomplish this, the system uses the seat microphones to measure the noise in the cabin, then generates anti-noise through the speakers to create quiet zones around the occupants."
Woke up and boom active road noise reduction enabled. @elonmusk you are a mad man. #plaidarmy @JoshWest247 @PauljHorton pic.twitter.com/Y5t3xaz1pV
— Aleksa St. (@astanoje) December 15, 2021
The latest software update also includes improvements for the following:
- TIDAL
- Rear Display
- Traffic-Aware Cruise Control Chime
- Add Stop
- Rear Cabin Climate improvement
Why does Tesla call it Active Road Noise Reduction and not Active Road Noise Cancelation?
You must have heard about the Active noise-canceling headphones by now. This technology has been around in one way or another for more than a few decades. Today, you have it even with your Apple AirPods. The tech appeared in the auto industry sometime in the 2000s as an option for certain Honda models.
Still, it became, sort of, mainstream in the US when Bose introduced it as Engine Harmonic Cancellation (EHC) in the 2011 Cadillac Escalade and Infiniti M.
Now, the feature has several different names:
- Bose called it Engine Harmonic Cancellation (EHC)
- Jaguar calls it Active Road Noise Cancellation
- Hyundai dubbed it Road-Noise Active Noise Control (RANC)
- BMW and Mini played with the name of Active Sound Design
Nevertheless, the idea behind it is clear - to cancel out or, at least, reduce unwanted sounds in the cabin, thus basically making the cabin a quieter place.
The actual reason why Tesla calls its system Active Road Noise Reduction is that the tech cannot cancel out all unwanted sounds. It can, however, reduce it by a bit. I would say that this shows Tesla's transparency.
How does Active Road Noise Reduction work?
To figure out how it works, I will, once again, shift your focus to noise-canceling headphones. The principles are the same.
Noise-canceling headphones can eliminate unwanted noise produced by the external environment while simultaneously playing the desired audio.
These headphones do this by using the microphone to measure the unwanted noise produced by the environment and then calculate an anti-sound wave. This anti-sound wave is added to the audio waveform (like the music you listen to). When the combined waveform plays through the audio, it cancels the environment noise.
More in-depth?
As Wikipedia teaches us, "in physics, the sound is a vibration that propagates as an acoustic wave, through a transmission medium." In this case, the medium is the atmosphere around us. Now, if the headphones know what kind of sound waves are coming to them, they can produce a sound that cancels them out. You can see a microphone on the exterior of the noise-canceling headphones, which picks up all the exterior sounds. Then, the microprocessor inside the headphones calculates what kind of sound waves a headphone should produce to smooth and cancel out the waves inside the ear.
Headphones can make that sound wave, thus canceling exterior sounds while playing your favorite tune.
Even more in-depth!
Sound waves are "traveling high-pressure zones" called compressions, and low-pressure zones are known as rarefactions. Noise-canceling headphones' job is to figure where high pressure and low-pressure zones are and then produce sound waves that are equal and opposite. By that, I mean that headphones need to generate a low-pressure zone for every high-pressure zone, and for every low-pressure zone, headphones need to generate a high-pressure zone.
This is the principle Tesla uses for its Active Road Noise Reduction. The microphone they have put in the seat is precisely there to identify sounds coming from beneath the vehicle and actively instruct the chips to calculate adequate response from the speakers.
According to drivers who tested the feature, the tech works, but it is subtle. Tesla will likely continue to perfect it and release an update in the future.
Conclusion
Active Road Noise Reduction is available only for the high-end Model S and Model X. The tech could reach cheaper cars in the future if Tesla decides to install needed hardware.
This is a welcomed addition to an electric car.
Image source: Courtesy of Tesla for media.
Image source: Courtesy of Hyundai for media.
Safet Satara is an automotive journalist and car enthusiast who has nurtured his automotive endeavors since he was 19 years old. He specializes in European cars, EV technology, and research about automotive industry issues. Safet has also written automotive pieces for Gearheads.org, Topspeed.com, Autowise.com, and various print magazines, including ProAuto. His specialty - testing cars - more than 500 tested cars under his belt.
You can follow Safet via Facebook, Instagram, and Twitter.
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Tesla has started rolling out its Active Road Noise Reduction feature for the new Model S and Model X. The function allows the cabin to be quieter when the vehicle is driving over rough surfaces. The feature was introduced as part of software update 2021.44.5.
The following are the feature’s Release Notes: “Your vehicle now has the ability to actively reduce low-frequency road noise while driving on rough surfaces. To accomplish this, the system uses the seat microphones to measure the noise in the cabin, then generates anti-noise through the speakers to create quiet zones around the occupants. To access, tap Audio Settings > Options > Active Road Noise Reduction.
”
Woke up and boom 💥 active road noise reduction enabled. @elonmusk you are a mad man. #plaidarmy @JoshWest247 @PauljHorton pic.twitter.com/Y5t3xaz1pV
— Aleksa St. ⚡️ (@astanoje) December 15, 2021
It should be noted that Active Road Noise Reduction would only be made available for Tesla’s flagship vehicles — the Model S sedan and the Model X SUV. This is because the feature is hardware-related, with Tesla installing Active Noise Canceling Microphones in the vehicles’ front seats as part of the Model S and Model X’s interior refresh. Such components are currently not installed in the Model 3 sedan and Model Y crossover.
That being said, initial videos from new Model S drivers that have been shared on YouTube suggest that Tesla’s Active Road Noise Reduction is still quite subtle right now. Tesla Model S Long Range driver Michael Hopwood, for example, tested the feature while driving on a rough chip seal road. During his drive, the Model S owner noted that he felt like the cabin was better with Active Road Noise Reduction enabled, though its effects seemed very understated.
Considering that this is only the initial release of Tesla’s Active Road Noise Reduction feature, it is all but certain that the function will get significantly better in the near future. Tesla is known to refine its vehicles’ features over time through over-the-air software updates, after all. Together with the noise-canceling microphones that have been installed in the new Model S and Model X’s interior, Tesla’s software improvements could make the flagship EVs’ cabins into some of the best in the industry.
Watch a Model S owner’s drive with Tesla’s Active Road Noise Reduction enabled in the video below.
Don’t hesitate to contact us with news tips. Just send a message to [email protected] to give us a heads up.
Tesla rolls out Active Road Noise Reduction for new Model S and Model X
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One of the most beautiful headphones on the market is Apple's AirPods Max, which went on sale in December 2020, a few months after the Sony WH-1000XM4 headphones. The product of the "apple" corporation received a modern appearance, very stylish and fashionable, but the sound quality is very mediocre considering its cost, the metal case is too heavy, the protective case is impractical, and the complete absence of any wired connection options, at least through 3. 5mm jack no fancy with Lightning. And now, to the delight of all lovers of really high-quality sound, the Japanese corporation has revealed to the world its long-awaited new product - Sony WH-1000XM5.
The new wireless earbuds came out a year and a half after the previous generation. The novelty received an updated appearance, reminiscent of the design of Apple's AirPods Max, but with improved active noise cancellation, better sound quality and a number of other features. Compared to the 2020 version, the new model is 4 grams lighter, but it imposes a clumsy design, due to which the headphones take up significantly more space anywhere, and the protective case itself is almost twice as large. For all those who travel a lot or just use headphones on the road, this can be a good reason to buy an older model. However, due to the clumsy design, the novelty is noticeably stronger, so the chances of its failure are lower.
Inside the Sony WH-1000XM5 are 30mm carbon fiber drivers that allow you to listen to LDAC and DSEE Extreme music. According to the Japanese corporation, the new headphones sound better than any other models among all those that it has ever created. The use of modern materials and technologies has allowed to increase the depth of sound, improve the upper and lower frequencies, as well as to achieve a more detailed sound in general. The new headphones have not one, but two processors responsible for active noise cancellation. Paired with the classic branded QN1 module, the V1 coprocessor is used. In addition, ANC now uses eight microphones at once, while in the 2020 model there were only four. In practice, this means that now noise reduction will work even better and more efficiently, cutting off even more external noise.
The four microphones in the new product are used to transmit sound during voice calls, and the battery life of the Sony WH-1000XM5 is 30 days with active noise cancellation. This should be more than enough for one week of listening for two or three hours a day, to work and back.
