Abstract: A method is provided for operating an ultrasonic sensor installed in a concealed manner such that a diaphragm of the sensor is connected to a vehicle part whose instantaneous properties influence a directional characteristic of the sensor, where a threshold value is used to suppress interference signals in the case of pulse-echo measurements using the ultrasonic sensor. The method adapts the threshold value to the directional characteristic of the ultrasonic sensor predetermined according to the instantaneous properties of the vehicle part. Further aspects of the invention relate to a driver assistance system including at least one ultrasonic sensor installed in a concealed manner and a computer program product which is designed to execute the method.

Abstract: An ultrasonic transducer is described as having a diaphragm cup that is connected to a housing by way of a preferably annular fastening element that radially surrounds the diaphragm cup at least indirectly at its outside diameter with reference to a longitudinal axis of the diaphragm cup.

Abstract: A diaphragm cup is described for an ultrasonic transducer, having a blind-hole-shaped recess that is delimited by a side wall and by a bottom region, the bottom region being embodied for fastening of a transducer element, the recess having, in a cross-sectional plane disposed perpendicularly to a longitudinal axis of the diaphragm cup, an oval inner contour having a major axis and a minor axis.

Abstract: An ultrasonic sensor apparatus for placement on a cladding component of a vehicle, encompassing an ultrasonic sensor and a holder. The holder encompasses a cap and a support. The support has a connecting portion by way of which the support is intermaterially joinable to the cladding component, and has a frame portion, an opening through which a vibrating element of the ultrasonic sensor extends being provided in the connecting portion. The cap preloads the ultrasonic sensor toward a coupling element, and is mounted detachably on the support using a latching connection. The cap delimits the receiving region on the side facing away from the connecting portion. The support is a hybrid component having a metal insert overmolded with plastic.