National Traffic Safety and Environment Lavoratory

Noise Test

Steady and Accelerated Running Noise Level Test

Noise levels are measured when the motor vehicle is running at a constant speed and when accelerating from a constant speed on the road prescribed in the international standards.

Proximity Stationary Noise Level Test

Noise levels are measured at a prescribed position close to the exhaust pipe outlet, when the vehicle is stationary and the engine revolution speed is high in a unloaded.

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