around 30
The human range of hearing is from 20 Hertz to 15,000 Hertz, with individual variations. Most humans lose some of their higher range as they age.
At the age of eight
Birth
Ludwig van Beethoven began to lose his hearing quite early in life.
When you lose hearing with age there is little that can be done. There do not make hearing aids for dogs.
At the age of 6 she became deaf due to an illness.
Beethoven's hearing started to lose by his early twenties. By the age of 30, he was completely deaf. Despite of this fact, most of his masterpieces were written after this period.
He started to lose his hearing when he was around 30 years of age.
They don't neccesarily lose their hearing at all....
Better hearing of the humans
You can lose your hearing because you listened to music too loud or you're growing old.
I suspect that humans have the lowest hearing. Humans no longer need acute hearing to listen out for danger - as an antelope would need to do.