Andrew R Stewart 

I believe that the little blue lines running cross the tire tread cap is the puncture resistant liner just starting to show through the work rubber tread. In my world this tire is just at the worn out point. Replace soon, but likely to be a problem in the immediate future. This type of wear generally doesn't produce a noise, till the tube herniates out a casing hole...

Now spokes can and do make noises sometimes. Generally a clicking type. Sometimes at their crossings, other times at the nipples. Now that you have done some work on them this cause of noise might be different. Is it? Andy