b'Engineer Innovation | Automotive & Transportationcompliant to ISO 10844:2014 and thethe local transportation industry. The second surface to ISO 10844:1994. Bothnew full-fledged proving ground now surfaces used to homologate vehiclescovers the testing needs of all types of according to the widely used ISO 362-1vehicles, from two- and three-wheelers pass-by noise testing standard and itsto passenger and commercial vehicles.regulatory counterpart UNECE Regulation 51.3. The second surface isWith regards to noise abatement, the designed to certify vehicles according totesting facilities include world-class the standards latest revision. Both testpass-by noise testing tracks, helping surfaces are standards compliant inmanufacturers comply with the latest terms of surface homogeneity, texturestandards and regulations. depth, residual void content and noise absorption coefficient. The entire trackThe track is used for development and series has lighting arrangements tohomologation testing according to the allow night testing when temperaturesapplicable standards for pass-by noise are within range of the standards andtesting. It is also employed to perform environmental background noise isvehicle interior noise, rolling noise or typically at its lowest.stationary noise measurements. The pass-by noise tests measure noise Testing is an essential step in theemitted as the vehicle passes by the process of developing new vehicles,microphones at a given speed, gear and from their components to their fullacceleration ratio. Precise evolution of systems, says Dr. Karuppaiah. In India,overall levels in function of vehicle the availability of appropriate testingposition, speed and acceleration are facilities was limited and not alignedcalculated according to the standards. with the rising demand from the vehicleThe next step in pass-by noise and component manufacturers. Thisengineering is determining the source was a bottleneck for the development ofcontribution to the pass-by noise levels. 78'