Apparently, there's a noise that only people under 25 can hear. vibrate three tiny bones, transmitting sound into the inner ear) stops working as well, making certain high frequencies hard or impossible to hear. No, I can't.
Hearing high and low with Education.com Teens are effectively driven away, but many adults can't hear this sound at all! Things whistle oscillates at a relatively high frequency, so the resulting sound is very high-pitched.
There are still plenty of sounds in the world that you can't detect. worse, eliminating even more sounds from the range of audible noises. means that older people can't hear some high-pitched sounds they would have.