engineering
noise management solutions
SAFETY – INVOLVEMENT - ENVIRONMENT Hybrid and electric vehicles present a safety concern at low speed as they often cannot be heard and recognised, particularly by high risk groups such as the elderly, children, cyclists and particularly the blind and their guide dogs. Several countries are currently reviewing legislation to state that these vehicles must emit a recognisable sound above a minimum noise level to help improve pedestrian safety. HALOsonic’s External Sound Synthesis (ESS) for electric and hybrid vehicles generates an externally recognisable vehicle sound focused in the direction of travel, which is a potentially life-saving technology. The driving experience in any car is greatly enhanced when the engine sound provides the driver with audible feedback relaying rate of acceleration and speed. This sense of involvement is lost in hybrid and electric vehicles as under battery power there is no recognisable “engine” sound. HALOsonic’s Internal Sound Synthesis (ISS) creates a link to the sensory connection that traditional internal combustion engine (ICE) cars provide, enhancing the driving experience and awareness by creating speed and throttle dependent sounds audible through the in-car entertainment system. The energy conscious car of tomorrow will be lighter and will increasingly feature new powertrain technologies, such as hybrids, cylinder de-activation, stop/start etc, many of which degrade cabin sound quality. HALOsonic’s Engine Order Cancellation (EOC) and Road Noise Cancellation (RNC) solves this problem by acoustically cancelling the unwanted sound with opposing frequencies, creating a quiet zone for each occupant without the additional weight of NVH materials.
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KEY FEATURES OF HALOSONIC
BENEFITS OF HALOSONIC
Lotus Engineering has over twenty years experience in active noise control and has patents covering four key technologies.
Active noise control technologies provide a range of benefits to pedestrians, the driver and the environment.
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Road Noise Cancellation (RNC)
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Engine Order Cancellation (EOC)
HALOsonic actively monitors and controls refinement levels in the cabin, minimising undesirable noises
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Internal Sound Synthesis (ISS)
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External Sound Synthesis (ESS)
HALOsonic improves pedestrian safety in electric and hybrid vehicles
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HALOsonic provides NVH solutions without the added weight of traditional techniques
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HALOsonic enhances the driving experience and feedback for Hybrid and electric vehicles
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HALOsonic ISS and ESS can be customised to provide a unique vehicle sound supporting the “Brand DNA”
IS-3/04-12
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