Sound sensor i.e. ultrasonic sensor, arrangement for use on rear side of component e.g. bumper, of motor vehicle, has two regions comprising thickness gaps, ramp and slots that cause impedance difference in arrangement

摘要

The arrangement has a sound sensor (20) for sending and/or receiving acoustic waves and shifting a component in bending waves. The sensor is arranged in a passband region (50) of the component (30) that is surrounded by an absorption region (40). The absorption region is formed on a rear side of the component. The two regions comprise thickness gaps (60), a ramp, and slots, where the gaps, the ramp, and the slots cause impedance difference in the arrangement.