Hi,
With mems ultrasonic microphones
https://www.invensense.com/products/ics-41350/
Available at $2, it seems feasible in principle to have a very cheap ultrasonic recorder plugged into the audio jack or USB port. TDK have good docs.
In particular it looks possible to use the audio jack and send the clock signal down the audio channel and take the output from the audio. Then use spectrum analyser app
https://play.google.com/store/apps/details?id=org.intoorbit.spectrum
1. Is this feasible ? Is power sufficient. Will clock signal be clean enough ?
2. Might anyone be interested in getting a prototype made ?
There are multiple applications and bat detectors sell at $1000+.
Also cheap high powered ultrasonic animal repellants can be weaponised and cause hearing damage in humans.
So there is certainly a potential market for ultrasonic detector.
With mems ultrasonic microphones
https://www.invensense.com/products/ics-41350/
Available at $2, it seems feasible in principle to have a very cheap ultrasonic recorder plugged into the audio jack or USB port. TDK have good docs.
In particular it looks possible to use the audio jack and send the clock signal down the audio channel and take the output from the audio. Then use spectrum analyser app
https://play.google.com/store/apps/details?id=org.intoorbit.spectrum
1. Is this feasible ? Is power sufficient. Will clock signal be clean enough ?
2. Might anyone be interested in getting a prototype made ?
There are multiple applications and bat detectors sell at $1000+.
Also cheap high powered ultrasonic animal repellants can be weaponised and cause hearing damage in humans.
So there is certainly a potential market for ultrasonic detector.