What is the lowest note that can be sung by a human?

Ken Turner hit a C1 during the song “Rainbow of Love”. Tim Storms sung a B0 on the studio recording of “That Lonesome Road”. There are some live versions of this song where he goes down to a G or an F below that. J. D. Sumner bottomed out at a G0 in a 26 second vocal slide, at a live concert, singing backup vocals for Elvis Presley. I believe the song was “I Got A Woman”, but I’m not entirely sure on that one. Paul David Kennamer sung a C0 on the recording of “How Great Thou Art”. For 18 years, J. D. Sumner held the Guinness World Record for recording the lowest bass note, but that record has recently been broken several times. According to Guinness World Records, Tim Storms sang a C-1 at a frequency of Hz in 2002 then broke his own record in 2008 with a G#-5 at Hz. Roger Menees then beat that record by singing an F#-6 at Hz in 2011. But Tim Storms reclaimed his title in 2012 by singing a G-7 at Hz, which is currently the world record for the lowest vocal note.