We can't see in infrared, but there's clearly information there. Same with infra/ultrasound and other sounds that are buried in our hearing.

It may not be pertinent information in the case of music, but it's definitely information.

If you cover your eyes and can't see me, do I still exist?

MP3 is audibly lossy, especially at lower sample rates.

So yes - you can hear it's gone.

And if you look at a spectrograph, you can see it's gone, too.