ELI5: Explain Like I'm 5

Physics of music

Hey there kiddo! So today we are going to talk about the physics of music. Do you know what music is? Yes! It's when we listen to different sounds that make us feel happy, sad, excited or relaxed.

But did you know that those sounds are actually vibrations? When you play a guitar or a piano, you are making the strings or keys vibrate, which creates sound waves. These sound waves travel through the air and reach our ears, where we hear them as music.

Now, let's talk about some important terms you should know when it comes to the physics of music. First, frequency. This is how often the sound wave vibrates per second - the more often it vibrates, the higher the pitch of the sound. For example, a bird chirp has a high pitch because the sound wave vibrates very quickly, while a lion's roar has a lower pitch because the sound wave vibrates more slowly.

Another important term is amplitude, which is the height of the sound wave. The higher the amplitude, the louder the sound. So if you play your guitar strings harder, the amplitude of the sound wave is higher and the sound is louder.

Now let's talk about the different types of musical instruments - wind, string, and percussion. Wind instruments, like a flute or a trumpet, produce sound waves by blowing air into them. The air vibrates within the instrument and creates sound waves.

String instruments, like a guitar or a violin, produce sound waves by playing strings. The strings vibrate when they are plucked or strummed, creating sound waves.

Percussion instruments, like drums or cymbals, produce sound waves when they are struck. The vibrations from the drum or cymbal create sound waves.

So there you have it, kiddo! The next time you listen to your favorite song or play an instrument, remember that it's all about vibrations and sound waves!