Instructables page for a mosquito repelling ultrasound arduino board
https://www.instructables.com/Electronic-Ultrasonic-Emitter-Basic-Version/
#asknostr #ultrasound #DIY #nerds #help
Been researching ways to create DIY minature ultrasound wave emitter for the 17-20 kHz range, looking for help or pointers to anything similar out there in the wilds...
I wish to build an 'inaudiable to humans' wearable ultrasound generator for protection from digital microphones and recording devices. Range 1.5-3 meters away from wearer. I have found some Arduino projects for pest-control and sonography using their board but it seems their standard ultrasound distance measuring module does not go to the right ultrasound range I am seeking for this...
Imagine having a personal ultrasound forcefield that emits static noise for microphone but not for anyone you are speaking with directly.
Whatever I build is FOSS, ideally the device will use a generic ESP32 and some small speakers with the right piezoelectric crystals.
Starting point for this rabbit hole: https://github.com/skewyapp
Ultrasound crystals: https://biologyinsights.com/what-are-ultrasound-crystals-and-how-do-they-work/
Any pointers or tips welcome
Discussion
Rubberducky FTW
Realised there is no need for the wearable to generate the frequency when I can just preload recorded sounds at right frequency and have it playback/loop those files.
This project became a lot easier, thanks ducky