The deepest human sound, in terms of frequency, is the fundamental frequency of a male's voice. This frequency typically falls within the range of 85 Hz to 155 Hz.
It's important to note that the deepest sound a human can produce depends on several factors, including:
- Age: The vocal cords naturally become thicker and less flexible with age, leading to a lower fundamental frequency.
- Gender: Men generally have thicker and longer vocal cords than women, resulting in lower-pitched voices.
- Vocal training: Trained singers can manipulate their vocal cords to produce sounds at a wider range of frequencies, including very low notes.
Therefore, the "deepest" human sound is not a fixed value but rather a range that can vary based on individual characteristics.