Method for operating an ultrasonic sensor apparatus for a motor vehicle with adaptation of a temporal profile of an amplitude in frequency-modulated excitation signals

The invention relates to a method for operating an ultrasonic sensor apparatus (3) for a motor vehicle (1), in which a diaphragm of a first ultrasonic sensor (4a) is excited to emit a first ultrasonic signal using a frequency-modulated first excitation signal (10a) and a diaphragm of a second ultrasonic sensor (4b) is excited to emit a second ultrasonic signal using a frequency-modulated second excitation signal, wherein the diaphragm of the first ultrasonic sensor (4a) and the diaphragm of the second ultrasonic sensor (4b) have the same resonant frequency (fR), wherein the first excitation signal (10a) comprises a first frequency range (fa) and the second excitation signal comprises a second frequency range (fb) that differs from the first frequency range (fa), wherein a temporal profile of a maximum amplitude (Am) of the first excitation signal (10a) and a temporal profile of a maximum amplitude (Am) of the second excitation signal are changed.