Asociation of music with a specified product in commercials

The main goal of my thesis is to figure out how big is the influence of music used to promote products in the form of commercials. Do people link the music used in commercial with the product that the commercial was promoting when they hear it and so could the commercial become more effective if we use music that is commonly played in for example radios? I tried to figure this out by doing a qualitative research in my thesis. I was also looking into musical preferences in commercials. By applying a quantitative research I was trying to figure out how much do personal musical preferences affect what we want to hear in commercials. My research commed with, for me, some interesting results. I found out, that most people do not link music with the commercial, that it was used in, when heard sepparately, no matter if the music is known more or less. I also figured out that personal musical preferences do not affect what music we want to hear in commercial as much as former expectations and stereotypes.