Electromagnetically induced acoustic noise
So let's say you have a toy truck that runs on batteries. When you turn it on, it makes a noise because the batteries make electricity flow to the truck's motor.
Now imagine you have a big machine in a factory that also uses electricity to run. But sometimes, the electricity can make a different kind of noise that you can't hear with your ears - it's called electromagnetic noise.
This electromagnetic noise can actually cause the machine to vibrate, just like how your vocal cords make your throat vibrate when you speak. When the whole machine starts vibrating, it can make a sound that you can actually hear - this is called electromagnetically induced acoustic noise.
It's a lot like when you strum a guitar string - it vibrates and makes a sound. But instead of a guitar string, it's big pieces of metal in the machine that are vibrating and making the sound you can hear.
So basically, when electricity is used in big machines, it can cause vibrations and make noise - just like your toy truck!
Now imagine you have a big machine in a factory that also uses electricity to run. But sometimes, the electricity can make a different kind of noise that you can't hear with your ears - it's called electromagnetic noise.
This electromagnetic noise can actually cause the machine to vibrate, just like how your vocal cords make your throat vibrate when you speak. When the whole machine starts vibrating, it can make a sound that you can actually hear - this is called electromagnetically induced acoustic noise.
It's a lot like when you strum a guitar string - it vibrates and makes a sound. But instead of a guitar string, it's big pieces of metal in the machine that are vibrating and making the sound you can hear.
So basically, when electricity is used in big machines, it can cause vibrations and make noise - just like your toy truck!