Harman is expanding its Halosonic suite of noise management solutions, which the company has developed with Lotus Engineering, using patented Active Noise Control Technologies.
The company says the development is “the first of its kind in the automotive industry,” maintaining the Harman Road Noise Cancellation (RNC) technology minimises noise generated from vehicle tyres.
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The RNC detects and neutralises unwanted road noise It is based on the principle of using ‘anti-noise’ to counteract road noise.
To implement RNC, the chassis of the vehicle is fitted with accelerometers which enable the system to measure correlation of vibration coming from the road and the resulting noise inside the cabin.
Subsequently, the proprietary algorithm in the controller creates inverse sound waves – coming from each speaker – through the car’s audio system to cancel out the noise caused by the road-induced vibration
Harman adds in looking at ways to lessen the environmental impact of vehicles and raise fuel efficiency, automakers are reducing vehicle weight, often by using less noise-dampening insulation in the car’s interior.
The use of lighter materials, however, increases perceptible road noise inside the vehicle, which then penetrates the interior.
“The traditional NVH (Noise, Vibration, and Harshness) methods have difficulties mitigating these issues satisfactorily – and these technologies also tend to add weight which cancels out the fuel economy effect of using lighter materials,” said a Harman statement.
“With this latest Harman solution, drivers and passengers can look forward to a quieter ride.”
