Okay kiddo, imagine you are playing with a toy drum. When you hit the drum strongly, it makes a loud sound, right? That's because hitting it hard means you create more energy, which makes the sound louder. This loudness of sound is called amplitude.
Now, imagine a machine that listens to this sound and only lets the loudest sounds pass through. This machine is called an amplitude gate.
The amplitude gate works like a bouncer in a club. It lets only the loud sounds (high amplitude) pass through and keeps the quiet sounds (low amplitude) out. It's like saying "Sorry, quiet sounds, you're not allowed in here".
But why do we need an amplitude gate? Well, sometimes we want to remove background noise from recordings or make sure only the loudest sounds get heard. For example, in a band, we might want to make the singer's voice stand out by reducing the volume of the instruments when the singer is singing. The amplitude gate helps us do this.
In summary, an amplitude gate is a machine that listens to sound and only lets the loudest sounds pass through. It helps us remove background noise and control the levels of sounds in recordings.