Ultrasound detector [HELP NEEDED]

[Sinistra]

Hi guys.

I am trying to build an ultrasound detector, which only responds to sound above 20KHZ. I checked the TeensyBat project and got some parts it uses.
For example, Knowles SPU0410LR5H-QB on PCB (https://www.teensybat.com/product/46...lr5h-qb-on-pcb).
I had trouble using it. I tried to use ADC (analog read) but the data I receive does not seem to react to any sound. I checked the datasheet for SPU0410LR5H-QB(https://micbooster.com/datasheets/spu0410lr5h-qb.pdf), but the data type was never mentioned.

Right now I wonder what if I connect the mic to the Teensy Audio shield at the holes for the Electret condenser microphone, and how to enable such a microphone? I checked the Schematic, Rev D2(https://www.pjrc.com/store/teensy3_audio.html) the mic pin seems to be connected to pin 10. How can I access the microphone signal that is being gained?

I wonder if any of you guys have a better way of building an ultrasound detector. or you know there is a programmable hardware available for purchase

Please Advise.

[PaulS]

Right now I wonder what if I connect the mic to the Teensy Audio shield at the holes for the Electret condenser microphone, and how to enable such a microphone? I checked the Schematic, Rev D2(https://www.pjrc.com/store/teensy3_audio.html) the mic pin seems to be connected to pin 10. How can I access the microphone signal that is being gained?

You may want to have a look at the Recoder example in File > Examples > Audio > Recorder.

Paul