Pass-by Noise Testing

Traditional Field Pass-by measurements are still the only way to certify a vehicle for exterior noise emission during operation, but Indoor Pass-by provides an extremely powerful and repeatable method of troubleshooting exterior vehicle noise in the controlled environment of an anechoic chamber.

Indoor Pass-by Noise Testing

In recent years, many vehicle manufacturers (and some of their sub-suppliers) have set up large semi-anechoic chambers with chassis dynamometers, where the vehicle can be loaded and operated and its interior and exterior noise measured.

With reduced influence of ambient weather conditions and site variations, measurements are more reproducible and with a stationary vehicle, a greate...

Vehicle Pass-by Noise Testing

Community noise regulations put stringent requirements on road vehicle exterior noise emission. Regulations apply to cars, trucks, buses, motorcycles, and scooters. Manufacturers have to certify that their vehicles comply with noise emission standards by measuring according to procedures defined by international standards, commonly known as Pass-by and Coast-by noise tests. In a pass-by te...