In a study conducted in New York schools found that those students who live in places where they constantly heard the noise of passing trains on the entire eleven months behind in its development of the students who lived in areas where they were not constantly exposed to any noise impact

Could you correct the punctuation please?
In a study conducted in New York schools, found that those students who live in places where they constantly heard the noise of passing trains on the entire eleven months behind in its development of the students who lived in areas where they were not constantly exposed to any noise impact.