EADGBE

This sounds boring compared to toilets and showers, but you can try singing to a stage mic connected to an audio interface card connected to your computer with logic, protools or whatever software connected to speakers. The latency (delay time that results from processing the sound) actually makes hearing your voice easier. Also, I've recently learned that playing and singing to a stage mic is an art that takes time to master, so it's good to have some practice.