I am trying to develop a system with Arduino and an ultrasonic sensor. The process that an ultrasonic sensor like the hc sr04 follows is:
- Send a wave (trigger signal).
- It hits the object.
- It returns to the module via a reflected wave (echo signal).
I want to block the reflected wave if the trigger wave hit a specific object so the Arduino don't read any echo signal or read a high distance (not the real distance to the object). I am trying with acoustic isolation but it's doesn't work. Can anyone help me please?