Hearing Aids

Went in to have the hearing aids check for proper function and found that the left one had a bad "speaker". That is the tube that comes out of the unit behind your ear and goes into the ear. I ask how often they go bad and she said not very often and they are part of the warranty for as long as I have them. So with both of them working they were much more comfortable today but I still find myslef asking people to repeat what they are saying and its because everything is jumbled together. The aids do a very good job of amplifying but it doesnt seem to separate voices and noises to a point that I can make out conversations any better. I'll have them for trial for one more week then I will need to make a decision.
Again thanks to all for your thoughts and experiences,
Rod