Well... according to a recent New York Times article published Dec 20, 2010, the answer is yes... Apparently, humming can keep air moving through the sinuses and nasal cavity which suggests improved ventilation. Good sinus ventilation means healthy sinuses. Their conclusion is based on two studies listed under the references below. Unfortunately, the conclusion can't extend to stating humming prevents sinus infections . The only way to evaluate that hypothesis is to do a study compar…