masking effect

I'm currently looking at discussions on Infrasonic Bass and Subwoofers and have been wondering if infrasonic Bass can mask content above for example 20Hz? Could this be a reason why some say that they can audibly hear a difference when adding/removing infrasonic Bass? (Seen this different...

This is an article I wrote for Widescreen Review Magazine which came out a couple of years ago. This is a revised and updated version. ---- Audibility of Small Distortions By Amir Majidimehr Spend five minutes in any audio forum and you immediately run into food fights over audibility of small...