Method of operating ultrasonic sensor, computer program product, ultrasonic sensor system and vehicle

A method for operating an ultrasonic sensor (2) comprising a membrane (3) and an exciter element (4); the method comprises: obtaining (S1) calibration data from a storage unit (9) storing the calibration data, the calibration data comprises a first frequency response (FR1) of the ultrasonic sensor in the transmission direction (SD) according to a membrane excitation frequency at different membrane temperatures and a second frequency response (FR2) of the ultrasonic sensor in the reception direction (RD) according to a membrane vibration frequency at different membrane temperatures; determining (S2) a current film temperature; determining (S3) a sensitivity of the ultrasonic sensor using the first and second frequency responses at the current membrane temperature; and controlling (S4) the current supplied to the exciter element and/or the gain of the ultrasonic sensor on the basis of a difference between the determined sensitivity and a pre-stored sensitivity. 一种用于操作超声波传感器(2)的方法，该超声波传感器包括膜(3)和激励器元件(4)；该方法包括：从存