AD
Active noise control might seem like a nice-to-have rather than a must have, but it’s becoming as significant a part of vehicle architectures as the metals and plastics used to create them. Active noise-cancellation systems, which detect unwanted noise and cancel it with signals broadcast through the car’s audio system, have now become fairly commonplace on premium cars. As well as making the driving experience more relaxing, active noise cancellation systems have a significant role to play in reducing vehicle weight by cancelling noise that would otherwise be controlled using hefty passive noise-damping materials.
Early noise-cancellation systems could tackle fairly narrow frequency ranges and have been good at dealing with predictable noise like that created by engine vibration. But more random sound, such as wind or road noise, is much harder to deal with.