This week's car segment talks about active noise control (or noise cancellation) in today's automobiles. Sam says that Active noise cancellation in cars is similar to that in headphones, which uses noise cancellation to dampen out ambient noise. It was first used in 1993 in Audis. Sam also says that active noise control can help your fuel economy as well. It enables you to drop minimum engine speed at idle to 600 RPM, giving you an extra 1 MPG. It's also being used in hybrids for the same reasons.
active noise cancellation
Joseph wants to know if there's any way to turn off active noise cancellation on his Motorola Moto. It is cancelling out his own voice! Leo says that under voice privacy, there is a voice cancellation feature. He can disable that. Motorola says it needs to be physically repaired in the phone. If that doesn't work, he can always put tape over the second mic.