Speech and sleep interference is another issue that arises from noise pollution. It can be difficult to talk while standing on a busy street, and in this case, people often have to shout to be heard. Therefore, hearing and interpreting each other becomes a issue. The noise of a big city is one of the most popular reasons for sleep disorders. High levels of noise often wake people in the middle of the night and hinder them while trying to fall asleep again, thus breaking bio-rhythms and causing weakness and drowsiness during the next day.