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I’m sure we all are very familiar with the sounds of the piano. It such a beautiful instrument creating lovely and touching music. But what is going on inside the piano? Maybe we can take a look now. Here is the part we often see that piano is play on and these are the keys. They are made of black and white keys. The black used to be Ebony and the white used to Ivory. But in the modern time piano, they are all made of plastic. So, these keys as I play on anyone of them they would be send to the bottom and I release, it would move up.
Now, what’s going on when I depress the key is that as we look inside, we see a little a felt hammers underneath that will hit on the string. And actually right after hitting the string, it descents a little bit so that the string is free to vibrate. But when we look at the other end what happens is as I play. As the hammer hits the string, this little thing the black part is called damper is raised. So, the string is free to vibrate. Once I let go of the key, the damper would be send and stop the key from vibrating. Now, let me do that again and now will experiment by using my finger to act as the damper to damp in the sound.
So, when I play the damper is up. Now I stop the sound. Now I play again. Instead of stopping with my finger I let go and the damper descents and it stop the sound. This is how the sound is generated in the piano and of course all together we have 88 keys and each key is going to trigger one hammer to hit on the strings and the dampers will be released. So, now when I play a whole number of keys like this, a number of hammers have hits on the strings and the number of dampers has been elevated. Now, when I let go, they all stop.
Now, as we look into the frame of the piano, we see that there’s a gold color frame. This is actually made out of cast iron. It’s very, very strong because it has to withstand the tension of all the strings all together point, which makes almost more than a hundred thumbs of force. So, in order to withstand that force, we have to find a metal like cast iron that’s strong enough to withstand that pressure. So just remember, someday if you’re going to a concert hall, you can think of the pianos playing all the keys but at the same time what’s going on inside the piano.
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