System fitted to Crown Hybrid in Japan, may come to Lexus
17 July 2008

Toyota has developed a noise cancelling system that could make Lexus cabins almost silent in the future. The system works using the same principle as noise-cancelling headphones. Microphones are installed in the car’s roof to detect ambient noise in the cabin. Speakers then play back an opposing frequency to effectively cancel the noise out. Toyota says its sound deadening system will be capable of muting low-speed engine hum and tyre roar. It will be used on the next generation of the Toyota Crown Hybrid, which is sold in Japan only, but the system could be used on other cars within the brand portfolio, including Lexuses.Other noise cancelling systems have been developed in the past, including ones created by Lotus and Mazda. They are likely to become more popular as manufacturers turn to them as a way to reduce the weight of sound-deadening materials in modern cars.

Will Powell

Join the debate

Comments
1

19 July 2008

Toyota have been a long-standing partner of Lotus', both at the time that that Lotus' anti-noise system was developed and now. ISTR that the first demonstration vehicle was a Celica with a notable "boom" period in the rev range. Lotus also demonstrated an active, vibration-cancelling engine mount at the same time.

I suppose Toyota's sudden "discovery" of this technology has nothing to do with Lotus' original patents lapsing...? Lotus' work seems to have been spawned from its earlier active ride experiments and the signal processing skills needed to make all of that function.

As an aside, I believe the first widespread use of this system was on the Saab 340B regional airliner in around 1994.

Add your comment

Log in or register to post comments

Find an Autocar car review

Driven this week

  • Lexus LC500
    Car review
    20 October 2017
    Futuristic Lexus LC coupé mixes the latest technology with an old-school atmospheric V8
  • Maserati Levante S GranSport
    First Drive
    20 October 2017
    Get ready to trade in your diesels: Maserati’s luxury SUV finally gets the engine it’s always needed
  • Jaguar XF Sportbrake TDV6
    First Drive
    19 October 2017
    The handsome Jaguar XF Sportbrake exhibits all the hallmarks that makes the saloon great, and with the silky smooth diesel V6 makes it a compelling choice
  • Volkswagen T-Roc TDI
    First Drive
    19 October 2017
    Volkswagen's new compact crossover has the looks, the engineering and the build quality to be a resounding success, but not with this diesel engine
  • BMW M550i
    First Drive
    19 October 2017
    The all-paw M550i is a fast, effortless mile-muncher, but there's a reason why it won't be sold in the UK