About the noise issue.
I have found that the noise sometimes seems to stimulate a bite. On rare occasions I have thought that perhaps the noise was bad. I think it largely depends on the moods of the fish (if they have moods and feelings) as to whether the noise is a negative or a positive. I do feel like in shallow water it is more of a negative, and in deeper water it is more of a positive.
Just my 2 cents.