| 摘要 |
<p>The invention relates to an ultrasound transmitting and receiving unit having at least one transformer for generating multi-frequency ultrasound signals and for receiving ultrasonic signals affected by an experimental media, particularly reflected, damped, and/or diverted ultrasound signals, wherein the transformer comprises a central element and at least one further element disposed all around the central element, wherein the elements generate and simultaneously emit ultrasonic signals of different frequencies, and receive the ultrasound signals of all frequencies affected by the experimental media, and feed the receiving signals formed there from to an evaluation device.</p> |
