Assuming you mean the lowest frequency humans can hear, that's about 20 Hz.
The lowest frequency that the human ear can detect is that of 20Hertz.
It varies with individuals of course, but 19-21 is very common
A Pigeon has the lowest hearing Frequency at .1 Hz.
the range of sound frequencies that humans can hear is about0to200Hz
3.15 khz
Humans can hear sounds of 20 to 20,000 Hz. Hearing is best in the middle part of this range. However, the acuity varies between individuals and changes with age so that there is no specific frequency at which humans hear best.
Humans are able to hear infrasound, depending upon frequency and amplitude.
It varies with individuals of course, but 19-21 is very common
The lowest frequency is 10 Hz. A human can hear frequencies from 20 Hz to 20,000 Hz. Some frequencies can be felt rather than heard.
Most animals can, but dogs can definitely hear them.
20 Hertz to 20,000 Hertz is the frequency response range that a human can hear. So in answer to your question 20 Hertz would be the lowest pitch a human can hear.