Noise Pollution in Mirpur 1, Dhaka The Reality: Mirpur-1 has noise levels of 97 decibels National Botanical Garden, Mirpur, Dhaka - reviews,open hours,photo spots,things to do | WanderBoat AI Trip Planner, which is significantly higher than safe levels. Context - How Bad Is It? Dhaka was declared the world's noisiest city by UN, with noise