I am thinking of trying person identification through their foot step sound / vibration. This is should be entirely possible because humans can do it and some research papers exist on this topic. But here comes the question:
Which (low cost) sensor(s) should I use?
Options I consider are:
- Vibration sensor (piezo)
Geophones are expensive, starting at around 60 EUR, microphones are not good at low frequencies, accelerometer and vibration sensor might be not sensitive enough. Any Ideas?
Edited to add:
Are accelerometers sensitive enough to detect foot steps several meters away (asuming a hardwood floor)?
Any specific products you can recomend?