Can you hear this?

Most people over the age of 25 cannot hear much above a frequency of 13 or 14 kHz. As we age, the little hairs in our inner ear do not function as well and we begin to lose our hearing in the very high frequency ranges. Teenagers sometimes use ring tones in this range so teachers can’t hear their phone rigning in class. If you want to check which frequencies you can hear, go to this site and click on the different audio tones.