| 摘要 |
<p>The invention relates to device for environmental sensing, in particular for acoustic signal recording, comprising a converter (1) for transmitting and receiving signals, a signal processing unit (2), wherein the signal processing unit (2) is configured to determine a distance of the converter (1) from surrounding objects on the basis of a first signal transmitted via the converter (1) in combination with the reflected first signal received via the converter (1). The invention is characterized in that by means of the signal processing unit (2), the converter (1) is configured to be excited into transmitting in a signal form that is different compared to the oscillation signal of the converter, and to free the signal received via the converter (1) from the oscillation signal, at least partially, by means of a blocking filter (4). Preferably, the filtering and/or the frequency behavior of the excitation signal of the converter (1) are time-variant.</p> |
