It can travel in all media, including the tissue and blood. Most ultrasonic devices transmit and receive using the same transducer. Doppler ultrasound for blood velocity measurements. In this experiment we will use a very basic ultrasonic Doppler monitor. This device has two crystals, which allow operations at 5 MHz and 7 MHz.
Device also provides audio feedback that can be used during transducer placement.
Connect ECG electrodes in Lead 2 configuration. Using an oscilloscope, verify that a reasonable ECG waveform can be obtained. Turn on the Doppler Ultrasound, and verify it operation by gently tapping on the transducer while listening for audio feedback. Apply a thin layer of ultrasound gel to the transducer. Connect the audio output of the Doppler to the channel B of the oscilloscope.