| 摘要 |
A device 20 and a method for sound-based environment detection by means of echoes are proposed. The method comprises the steps: injecting an electrical signal into a sound transducer 1, thereby causing an emission of an acoustic measuring signal 2 via the sound transducer 1, determining a beginning and an end, of a dying-out dominance region with the aid of stored quantities from a data store 15 which are assigned to the sound transducer, picking up a first electrical signal r(t) of the sound transducer within the dying-out dominance region, determining characteristic properties, in particular of an impulse response and /or of a corresponding transform of a transfer function, of the sound transducer 1 from the first electrical signal r(t). The method may allow a statement to be made about the state of the sound transducer and/ or the reliability of a system using the sound transducer. The steps may be carried out within a measuring cycle for environment detection. The transducer may be installed in a bumper 5 of a means of transport. |
