If we look at musical voices, lowest frequency male voice is the bass. As the article says, the standard range from this type of voice is beween E2 and E4 which is 82.4-329.6 Hz. For females the deep voice is contralto which is between 174.6-698.5 Hz.
I doubt you'll have much luck with that. On average the lowest fundamental frequency for the male voice is about 85Hz. Hence, you're not very likely to find someone who can produce 80 Hz at all.
Very old post, but I felt a need to say something. A male with a bass voice typically averages under 100Hz when speaking and down to a D2 when singing. It also should be noted, my average vocal frequency is 77Hz, although, I can sing without extended techniques down to an E1 (40Hz). The average vocal frequency of a person cannot be changed like some people earlier in this thread indicated; that is dictated by both the length and thickness of the vocal folds. Basically, you cannot speak with a frequency you are not capable of without using extended techniques; such as subharmonics or fry, which are nearly impossible to carry through all forms of phonation to create a vocal F0 (average vocal frequency).
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Human voice level
in Genetics
Very old post, but I felt a need to say something. A male with a bass voice typically averages under 100Hz when speaking and down to a D2 when singing. It also should be noted, my average vocal frequency is 77Hz, although, I can sing without extended techniques down to an E1 (40Hz). The average vocal frequency of a person cannot be changed like some people earlier in this thread indicated; that is dictated by both the length and thickness of the vocal folds. Basically, you cannot speak with a frequency you are not capable of without using extended techniques; such as subharmonics or fry, which are nearly impossible to carry through all forms of phonation to create a vocal F0 (average vocal frequency).