This video from Tech Minds literally flew under the radar!  By that I mean I didn’t see it when Matt first released it some months ago.  Anyway, I’ve seen quite a lot of chatter about this subject of late, and so belatedly, I invite you to enjoy this very entertaining video showing a completely different application of an SDRplay RSPdx.  And that is Bat detection.

Because bats use ultrasonic frequencies for echo location, and these frequencies are above the range of human hearing, then you need some way of detecting these. Because the SDRplay RSP family of SDRs can span the spectrum from 1kHz upwards, they offer an ideal way to visualise the spectrum once the audio signals are converted to radio signals as demonstrated in the video: