The average range of human hearing is from 20 to 20,000 Hz. Bass frequencies are situated at 20 to 140 Hz, but below 60 Hz, sound is experienced viscerally, as a vibration. On stereo equipment, the bass space is 60 to 90 Hz. The low-end of the sonic spectrum is anecdotally associated with enhanced healing. I’m a fan of the low-end, and it may not heal you, but Bass Therapy at Sister (407 Central NW) on Saturday, Jan. 18, just mightset you right. DJs Dave 12, LazySuze and Halcyon spin resonant frequencies, and Chris Clavio VJs and mans video mapping. Starting at 9pm, feel the bass at this 21-plus fête. Tickets are five bucks.