I have a high instep, so I try to lace them as tightly as I can towards the bottom of the lace "ladder" with a bit more "give " towards the top.
That's interesting about the air sound - I had that problem with the first few pairs of decos I had because they were way too big. I sized down, got used to the snugger fit, and haven't had the problem since. Where is the gap between your foot and the shoe wall? Mine tended to be over the toes (shoe was too long, so the unsupported span between where the leather shaped away from my instep and where it met the toe stiffener was too long with a lot of room over the toes - so when I flexed while walking the shoes were like bellows!) and also next to the big toe joint. I would try to work out where there's excess room in your shoes and try to fill it and see if that works.
And thanks for the compliment!
I think its similar to me.
I have a high instep, but around the area where the first eyelets are (the bottom of the ladder as you explained), there is excess room.
I don't necessarily think its a size issue however, as I just bought a pair of Berluti's (yes, I know... Berluti ) and they're extremely snug but give off a similar sound when laced tight. My two cents is its just the shape of my foot. Bye Bye oxfords.
How much did you size down?