The leading audio brand has developed a way to eliminate noise created by rough roads, using accelerometers and microphones to measure vibrations.
Software and algorithms can then calculate an acoustic cancellation signal to be played through the car’s speakers to limit unwanted noise.
At present, many car makers use thick insulation and customised tyres as a way to combat external noise, but Bose says these approaches are not only less effective but can increase the vehicle weight and reduce fuel efficiency.
The move is the company’s latest attempt to help bring down noise levels in vehicles. Since 2010, it has used its technology to tackle engine sounds.
“For years, we’ve been asked why we can’t simply adapt our noise-cancelling headphone technology to vehicle cabins for a quieter driving experience,” said John Feng, manager of Bose’s active sound management solutions team.
“But we know it’s much more difficult to control noise in a large space like a car cabin compared to the relatively small area around your ears. However, through research advances and our relentless efforts to solve tough problems, we’ve achieved a level of road noise reduction that sets Bose apart from competitive offerings.”
Bose says the solution will be available to manufacturers whether or not they use their own in-car sound systems, with the first models to use QuietComfort RNC expected to be in production by the end of 2021.