Like a human you need a brain and some sensors, like we have eyes, ears.
So lucky you these days you can get small computer for not too expensive price.
1-So look for arduino board.
2-Find some robotic but sensitive microphone.
3-I don’t know if there is a sensor who could sensitive to tremors.
Then you have to connect those sensor to the board from first step and write some simple program.
And if you need to process audio that is a lot of math-ish work.
This is like graduate project. Or an advance hobby project.