This is a Guinness World Record video of Canadian country singer Joy Chapman achieving the lowest vocal note recorded by a female, with a sustained C1 measuring 34.21Hz. According to Chapman she, “has hypermobility syndrome that stretches to her vocal cords. This condition allows her voice to reach notes that others can’t.” Impressive. For reference, my voice can’t reach any notes except the ones that make my girlfriend tell me to stop talking because I sound like a leaf blower.