Study and Modification/Reduction of the Noise, Vibration and Harshness (NVH) characteristics of vehicles
The Auto-Sector of the region wants to eliminate / reduce the Noise and Vibration of the Vehicles.
The sources of noise in a vehicle can be classified as: a) Aerodynamic (e.g., wind, cooling fans of HVAC), b) Mechanical (e.g., engine, drive line, tire contact patch and road surface, brakes), c) Electrical (e.g., electromagnetically induced acoustic noise and vibration coming from electrical actuators, alternator or traction motor in electrical cars). Many problems are generated as either vibration or noise, transmitted via a variety of paths, and then radiated acoustically into the cabin. These are classified as “structure-borne” noise. Others are generated acoustically and propagated by airborne paths. Structure-borne noise is attenuated by isolation, while airborne noise is reduced by absorption or through the use of barrier materials. Vibrations are sensed at the steering wheel, the seat, armrests, or the floor and pedals. Some problems are sensed visually – such as the vibration of the rear-view mirror or header rail on open-topped cars.