Recently it was announced that the Cadillac ELR will cost $75,000 when it goes on sale in January 2014, more than twice as much as a Chevrolet Volt. Part of the price difference is the utilization of technologies not seen on the Volt, such as a state of the art noise cancellation system.
To build on the peace and quiet in the cabin that has become a staple of electric cars, the ELR also implements active noise cancellation, which activates when the cars range extending, 1.4L gasoline generator comes on, which sets off a mild drone.
“Acoustic refinement is an important attribute of every Cadillac interior, and ELR is no exception,” said Chris Thomason, ELR vehicle chief engineer. “Considering how quiet the car is during pure-electric driving we knew the generator sound had to be as pleasant as possible, and we were able to achieve it with active noise cancelling.”
The system electronically gathers input from the vehicle’s generator and powertrain and from three ceiling mounted microphones. It then calculates and produces the appropriate noise-cancelling signal and pumps it through the ELR’s Bose audio system.
GM says that active noise cancellation also helped eliminate the need for additional sound deadening materials, which reduces weight, thus saving energy and delivering a more dynamic driving experience.