The approximate range for human hearing is between 20 to 20,000 Hertz (Hz). This number is greatly dependent on the distance of the noise from the person and the type of noise that is being exhibited.
Hearing accuracy decreases as a person gets older. The ranges for hearing can vary depending on the age of the person, the conditions they are in and the different stimuli they have been subjected to. Due to these variations, tests and studies can have wide ranges of results. People who are very young, especially newborns, are not able to hear as well as older children, and hearing is generally at its best through the teenage and young adult years.