How do vibrations make sound?
Sound is caused by a vibration. Now, some of you might be saying – What’s a vibration? Well, vibration is just something that goes back and forth, back and forth. Now, if the object vibrates fast enough, it’s going to disturb the air. If the air vibrates, our ears are sensitive enough to pick that up. Now, to show you what a vibration actually does, we have a tuning fork – and this tuning fork will vibrate at 426 times every second. So, when I hit this, these two ends will vibrate. Now, it’s vibrating in the air, and we can’t see what the air is doing to us, but our ears can pick it up. So, let me just hit this and listen. (Sound) Now, when it’s vibrating, you might be able to see these ends are a little blurry, but you’re not going to see what’s really happening to the air. But, when I take this and touch this to the water – water’s a lot thicker than air, so we’re going to see what affect this actually has on water compared to the air. (Sound) And, that vibration actually disturbs th
