In Action 1:
Injecting a pre-recorded real waveform.
The perspex block can be seen clearly from this colour Doppler scanner image. Note the sensitivity of the device in picking up the low energy suppressed sideband Doppler signal.
The audio waveform injected was originally recorded using a Doppler flow phantom; whilst flow phantom signals change over time the captured waveform from such devices can be injected electronically and reliably reproduced ad infinitem.
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