28
15hz - 22khz
Already knew I had good hearing though infact my hearing does go above 22khz (Had ears tested awhile back at a factory I worked at), annoyingly I can usually hear most transformers when powered on including phone chargers, on some mobiles I can hear when the backlight is in use lol
Have to sleep with PC on or some other background "white noise" otherwise I start detecting things like watches, clocks etc even if there halfway across the room and it keeps me awake.