Went out to Adlershof with Jens today to visit gfai, the “Gesellschaft zur Förderung angewandter Informatik e.V.”, where the acoustic camera is being developed, and generously provided for the duration of this project.
In the background you can see the circular microphone array that feeds the analysis system. On the table there’s my ultrasound generator connected to the back of a cardboard speaker box.