Abstract: A method is disclosed in which ultrasonic echo signal data is obtained. The ultrasonic echo signal data at least partially represent an ultrasonic echo signal detected by an ultrasonic sensor. The ultrasonic echo signal data is normalised, which involves normalising at least one first data point of the ultrasonic echo signal data at least partially as a function of at least one second data point of the ultrasonic echo signal data. The first data point represents the value of the signal strength of the detected ultrasonic echo signal at a first detection time. The second data point of the ultrasonic echo signal data represents the value of the signal strength of the detected ultrasonic echo signal at an earlier second detection time. Normalised ultrasonic echo signal data including the normalised first data point are obtained as a result of normalising the ultrasonic echo signal data.

Abstract: A method is disclosed in which ultrasonic echo signal data is obtained. The ultrasonic echo signal data includes a plurality of data points. The ultrasonic echo signal data at least partly represents an ultrasonic echo signal detected by an ultrasonic sensor, and the ultrasonic echo signal includes signal portions tracing back to reflections on one or a plurality of reflection objects. A plurality of data points of the ultrasonic echo signal data are grouped into one or a plurality of data point clusters. Characteristic data is determined at least partly as a function of a data point and/or a plurality of data points of a data point cluster of the ultrasonic echo signal data. One or a plurality of the reflection objects are classified at least partly based on the characteristic data obtained as a result of the determination.