Could be indeed!
Augmented sensing, there's definitely something one can do. A ping (radar-like) every 5s, and in time you listen to echoes. The more intense, the higher the frequency.
Ping me through the contact in the doc if you're keen on discussing about this!
How small can the probe head get? Can I tape it to my ringfinger? Any health hazzards?
My first try would be taping it to my finger and listening to the signals enveloped mapped to my audible range.