Once upon a time in another universe, there was a silent society.
And everyday the only sounds heard all around the planet were those of nature.
Until one day people began creating sounds to copy nature so they could hear them anywhere. And these eventually progressed into something more musically tuned.
And because of this sounds based on nature began being heard within the city. And people started to be confused.
And because of this a way was designed to prevent the sounds from being heard everywhere, a way of keeping them inside peoples head so the society could remain in silence.
Until finally everyone was walking around with headphones that not only blocked sound from escaping but but also suppressed external sound from being heard.
And ever since that day people have forgotten what the real sounds of nature sound like.