How to make a proximity sensor to sound an alarm when another sensor is with in 5 to 10 ft

I am needing this to keep two people apart....It would basically be the opposite of a child proximity alarm, instead of sounding an alarm when the child is too far away, it would sound when it is too close .....Thanks for your help

Re-design7 years ago
Sounds like they might be self alarmed and you can maybe tell when they are too close by the yelling?
JakHamma (author)  Re-design7 years ago
usually by the time they are yelling it is too late...this is a home where people w/ disabilies lives and we need this to alert the people that help them that they are too close
Have you considered a restraining order?