Hearing and Talking

 Today, I will talk about how we hear and how we talk. It actually isn't a sound we hear, it's just a simple sound wave. All this begins with a vibration, like a piano hammer hitting a string. The vibration then causes a sound wave, which can travel through any kind of matter. Here's the cool part. Your outer ear catches the sound wave, which then goes to your middle ear. When the sound wave vibrates the eardrum, it also vibrates the hammer, anvil, and the stirrup. The vibrations then travel to the inner ear, in which holds a fluid-filled tube. As the vibrations go through this tube, they also vibrate tiny hair cells. The vibrations and these hair cells then go through the auditory nerve which they follow to the brain. The brain then contributes these vibrations as sound.

Now, I'll tell you how we talk. Remember how sound starts with a vibration? Well when we talk, our vocal chords vibrate. While talking, put your finger on your throat and see if you feel the vibrations. Also, the pitch of your voice depends on how much you tighten or relax your vocal chords.

Actually, without being able to talk and hear would have been very bad, because how would we have been able to communicate? Talking and hearing have been useful in many different ways, like on a construction site! Well, there you have it! You have now learned how we can hear, and how we can talk.