I've never understood people who can do that maybe it's a white noise effect not so much the music I can't do that. Actually I just realized that's not true I

I've never understood people who can do that maybe it's a white noise effect not so much the music I can't do that. Actually I just realized that's not true I can listen to instrumental music specifically classical just not pop or singing if I am trying to do something like study. I'm middle aged 45 years-old my concentration is getting bad but classical music is OK all other music and any other noise is not.