Have you ever walked past a high-pitched sound and wondered what it was, only to find that the person beside you doesn’t hear it?
Different people, depending on their age, are able to pick up on different frequencies of sound. The younger a person is, the higher frequency of sound they’re able to hear. A five-year-old can hear high-pitched sounds that someone in their late twenties may not be able to hear. This is because your ears have what are known as “hair cells” which pick up on these various frequencies. The more sound and stress these cells are exposed to, the more they tend to bend and break. With this, the hair cells that pick up on the highest frequencies are the ones that are ones that are first exposed to sound in general, so over time these “high-pitch” hair cells will be the first to be affected. Because of this, as time goes on, a person range of sound-frequencies that they can hear will lessen, so the high pitches that they were once able to hear as a child will not be able to be heard when they are thirty.