Voice over background change !

We have decided to use a voice over of many people talking in distoreted and dissonant conversation in a crowded room. Then we have lowered the volume to give the effect of many people talking in the background of a public place. Initially we had the original sound we gathered when we had filmed, but there was a problem in that. Firstly we had very burly men in the background speaking very loudly which was incredibly hard to dub over when we had to hear our lines aswell. Also we kept hearing awomen in the backf=gorund shouting with a very loud west-country accent "Fourty five".