Lotus Engineering planning a silent car

Article by Christian Andrei, on August 29, 2010

Plans for the development of innovative noise-cancelling and noise-creation systems have been made public by Lotus Engineering. The noise-cancelling system will be utilized to enhance cabin refinement by preventing external noises from filtering in, while the noise-creation systems will be employed to alert pedestrians of the presence of the otherwise almost silent hybrid and electric vehicles.

The carmaker dubs these systems as Road Noise Cancellation, Engine Order Cancellation and Electronic Sound Synthesis and these were developed in tandem with Harman Becker Automotive Systems.

Manufacturers will have the ability to largely improve in-cabin refinement with the presence of Road Noise Cancellation and Engine Order Cancellation systems.

Both systems utilize electronic systems that determine the signal needed to cancel noise, thereby effectively reducing both overall noise levels and specific audible frequencies.

The signal is then smoothly generated via the in-car entertainment system. On the other hand, the Exterior Electronic Sound Synthesis works by projecting a synthesized sound, contingent on the speed of the car, from speakers at the front and back of the car in order to provide safety for the pedestrian.

This is quite essential particularly for electric and hybrid cars which are virtually silent when running at lower speeds because of their quiet drive mechanisms.

The Internal Electronic Sound Synthesis benefits the car's occupants by creating engine speed and throttle contingent sounds that come up through the in-car entertainment unit. The carmaker says that these systems already have existing working prototypes and that they are working with car makers to employ them on the cars they produce.

Topics: lotus, electric car

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