Device for determining sound emission features of combustion engine mounted in vehicle, has emission source that transmits modulated ultrasonic signal from ultrasonic transmitter to ultrasonic receiver on transmission path to emit sound

摘要

The device has an ultrasonic transmitter, an ultrasonic receiver and an emission source. The emission source transmits a modulated ultrasonic signal from the ultrasonic transmitter to the ultrasonic receiver on a transmission path while emitting sound. The sound generators and ultrasonic receivers are arranged in an exhaust system (1) such that the sound emitted by the emission source spatially crosses the transmission path. An independent claim is included for method for determining sound emission features of combustion engine.