ELI5: Explain Like I'm 5

Sending loudness rating

Have you ever seen people in a recording studio talking about the loudness of a song? They might say something like "the loudness rating of this song is -12 dB." But what does that even mean?

Well, imagine that you have a toy car and you want to make it go faster. You turn a dial on a remote control to make it go faster or slower. Similarly, when we talk about loudness rating, we are measuring how much we turn up or turn down the sound of a song or any sound we are listening to.

The loudness of a sound is measured in decibels or dBs. But what is a decibel? It's like a special ruler for measuring sound. Just as we use a ruler to measure how long or short something is, decibels measure how loud or quiet something is.

In music production, we want to create music that sounds great on all kinds of sound systems like headphones, mobile phone speakers, or even in a big concert hall. To achieve this, we use a loudness meter that shows us how loud or quiet our music is.

When we send our music to someone else, we need to tell them how loud it is, so they can play it back the way we intended. So we use the loudness rating, which is the number that tells us how many decibels the music has been turned up or turned down.

Let’s say that the loudness rating of a song is -12 dB. This means that the sound engineer has turned down the sound by 12 dB from its original recording. And if the loudness rating is +6 dB, it means that the sound has been turned up by 6 dB.

Remember, just like turning the dial on a toy car can make it go faster or slower, the loudness rating tells us how much to turn up or turn down the sound of a recording. So, when you hear someone say the loudness rating of a song or a sound clip, just remember that they are talking about how loud or quiet it is compared to the original recording.