Dhaka, Aug. 4 -- Dhaka, the energetic capital city of Bangladesh, is a city that never sleeps. While this energy is a source of dynamism and activity, it has a dark, albeit insidious, side: noise pollution. This excess and unwanted sound is now a significant public health issue, with levels of noise far over what is deemed safe by the World Health Organization (WHO). From the deafening car horns to cacophonous construction work and vociferous political protests, the city is a hubbub that is taking a severe physical and mental toll on its people, especially its most susceptible members.The reasons behind noise pollution in Dhaka are numerous and relentless. Traffic on the roads is the biggest contributor. With increasing numbers of cars on...