I'm a builder who has built for over 10 years and we actually just ran into this issue lately. After pretty extensive research I believe as long as the nails are not extremely loose (should be about a nickels width away from the wall when nailed), the problem is the siding. Using .040" double five siding (at least lately) from certain manufacturers seems thin enough that when wind whips around the house it is able to blow into the seams of the siding causing a rippling effect up a sided wall that is noisy on the inside of the house. We have had a few solutions work but not without expense. Installing fanfold behind the .040" vinyl siding decreased the noise signifianctly. Also going to a .044" thick panel has also eliminated the noise. We are testing .040" double 4 siding to see if the 20% decrease in panel width increases the strength of the panel enough to decrease the risk of wind noise. If this helps you or anyone else in brainstorming to solve your problem then great, if not ignore it.