The invention relates to an interior trim part of a vehicle, in particular a motor vehicle, comprising a composite having a carrier (30) and a decorative element (10) on one side of the carrier, the decorative element comprising a viewing side (11) visible to an observer from the interior (100) of the vehicle comprising a substantially continuously closed surface at least in a partial region (B1), characterized in that the composite is thinner within the partial region (B1) facing away from the viewing side perpendicular to the viewing side, and is capable of ultrasonic vibration in the thinned region (B1), and by an ultrasonic sensor having an ultrasonic transducer, wherein the ultrasonic transducer is connected to the side of the composite facing away from the viewing side (11) over the entire surface of the thinned area (B1).
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