MaidenMadness said:you know why is wind created? its created by the unequalities of airpressure. upstairs, the gravity is weaker the temperature isn't that same as downstairs so airpressure isn't same. that causes wind inside the house(very mild one probably) and about the sound being so lond it depends whats in its way. some elements enhance the sound voule thus making them seem louder than they really are, and others make them softer than they really are
thanks professor for this nice lesson LOL