Ive written some programs to test equal loudness... it is very real and also very variant depending on the person. It should help everyone hear things more like they are reference, but would be cool to have a customized user test. Everyone's equal loudness curve is different... but everyone's hearing and opinion of 'good' is different to. At some point you just have to give up that your hearing response is different from everyone that made the movie/cd/game.