An anonymous reader writes "Since most readers of slashdot are IT'ers, I assume this is a familiar story: when working in IT, it often happens you need to be standby or 'on call' during a certain period. That may mean you can receive phone calls or text messages from a monitoring system in the middle of the night. I've been looking for a way to have those alerts wake me in the middle of the night but not my partner, who is sleeping right next to me. Are there hardware aids out there that can alert a person without troubling their close environment? I'm thinking armwrists, vibrating head pillows, ..."