Large cities can be quite loud for you to be living there. This Top 10 Loudest Cities in the World that we gathered from soundproof cow gives us some fascinating Info. It shows that the loudest city is more louder than the jet plane flying over 100ft above you measured at 100 db. Similarly, the Third largest country seems to be louder than the Motorcycle 25 ft away. Except the 10th country in the list, all of them seems to be louder than the vacuum cleaner which is measured to be 70db.