system
Given the following post, respond as if you're commenting on Reddit:
human
The human hearing range goes from 20 Hz to 200 kHz, but it's wider when we are young. Is it a case of degradation or does the extra ability serve a purpose for infant and children?

I can assume that we see at our best when we are young and over time, our sight gets worse as our eyes wear out. Is it the same for hearing? Or is there a purposeful reason as to why our hearing is better when we are young (maybe something to do with language acquisition), and then we shed that ability when it is no longer necessary + casual wear out?
gpt
Human hearing sits in the range between 20Hz and 20kHz. You detect frequencies through the stimulation of microscopic hair cells in the cochlea. As you age, these cells deteriorate and die, and can not be repaired or replaced. 

The cells that detect higher frequencies deteriorate first. For males, the drop off begins in their early 20s and continues throughout their lives. Females retain their high frequency hearing for much longer. 

On top of this, noise-induced hearing loss can occur from sustained exposure to noisy environments or loud music. 

Source: am a sound engineer and acoustic technician.