Cadillac ELR EREV uses active noise canceling across all engine speeds
17 October 2013
The 2014 Cadillac ELR extended range electric vehicle uses active noise canceling across all engine speeds when the on-board gasoline-powered electric generator turns on for extended-range driving.
ELR uses active noise canceling to preserve the peace and quiet delivered by the vehicle when in battery-electric mode. Most cars that use this type of sound-neutralizing technology aim simply to mute exhaust boom (low frequency tones) at low engine speeds, such as when idling, GM noted.
Acoustic refinement is an important attribute of every Cadillac interior, and ELR is no exception. 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 canceling.—Chris Thomason, ELR vehicle chief engineer
The active noise canceling system in the ELR electronically gathers input from the vehicle’s generator and powertrain, as well as from three ceiling-mounted microphones. The system calculates and produces the appropriate noise-canceling signal, which is delivered through the Bose audio system’s speakers and subwoofer.
ELR’s engine functions primarily as a range-extending, gas-powered generator for its advanced electric drive propulsion system. Active noise canceling keeps the ELR’s interior quiet during extended-range operation, including long-distance drives and steep ascents.
Active noise cancellation also helped eliminate the need for additional sound-deadening materials, reducing mass, which saves energy and helps deliver spirited performance. ELR uses a variety of sound-buffering and -absorbing materials to minimize wind, road and engine noise, including:
Acoustically laminated windshield and thicker front-door glass;
Liquid-applied sound deadener applied to the floor pan, trunk and roof;
Triple-sealed doors with acoustic perimeter water deflectors;
Mass-efficient sound-absorbing dash mat and carpet system;
Acoustic foam baffles inside body cavities and in between inner and outer quarter panels; and
An isolated front suspension cradle with hydraulic powertrain mounts to isolate road and engine vibration.
ELR is available nationwide in the US beginning in January 2014.
TrackBack URL for this entry:
Listed below are links to weblogs that reference Cadillac ELR EREV uses active noise canceling across all engine speeds: