how low can you ...
It's official: southern Illinois resident Roger Menees is the lowest of the low.  
The former gospel singer from Anna, Illinois, received a certificate this week from Guinness World Records saying he had sung the lowest note ever produced by a human voice, the Southern Illinoisan reported.  
Menees managed the feat on Feb. 11 at his Carbondale recording studio. He hit 0.393 hertz — a very low F-sharp. The previous record was 0.797 hertz.