The two corresponding bar charts illustrate various amounts of Europeans, measured in millions, across metropolitan and rural areas in 2007, who were affected by four distinguishable types of noise.
An overall assessment of the data obviously reveals that all four forms of sound pollution disturb more citizens during the daytime. Notably, noise disturbance coming from traffic affects the largest number of citizens, while all the other sources impact only a fraction of that figure. This trend is shared similarly across those two different areas.
Looking first at the most dominant source, bustling sounds from traffic ironically affected 64 and 34 million people in urban and rural areas respectively during the day, and edged down by approximately 25% during the night. Uniformly, though only having a small fraction of people if compared to the dominating source, two less people in both settings are troubled by train noises during the night. Aircraft and industry, which bother even fewer people, are also marginally affect more people during the day. However, no rural resident is troubled by industrial noises.