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Noise is a sound wave that is generally aperiodic in nature, with random and undefined pitch, and which interferes with the quality or detection of other signals. Even so, noise is an unwanted sound that is regarded as an environmental hazard that affects animal and human health. The expansion of urban sprawl, transportation, economic, and development activities is thought to have a significant impact on noise pollution. This research focuses on level of noise in Chattogram Metropolitan Area (CMA) based on both qualitative and quantitative methods. Findings show that, noise pollution level in the study area is exceeded both national and international standard. It will not be an exaggeration to say that noise pollution is endangering city dwellers' quality of life. The noise pollution level is taken several time intervals. According to the study, the noise value is 86.3 dB(A), 87.23 dB(A), 94.07 dB(A) and 84.35 dB(A) at 10 am-12 pm, 2 pm-5 pm, 5 pm-7 pm and 8 pm-10 pm respectively in the industrial area during working day. 78.8 dB(A), 78.03 dB(A), 84.8 dB(A), 76.08 dB(A) at 10 am-12 pm, 2 pm-5 pm, 5 pm-7 pm and 8 pm-10 pm respectively in the industrial area during holiday. 64.0 dB(A), 60.58 dB(A), 62.21 dB(A), 55.95 dB(A) at 10 am-12 pm, 2 pm-5 pm, 5 pm-7 pm and 8 pm-10 pm respectively in the residential area during working day. 58.43 dB(A), 61.71 dB(A), 63.9 dB(A), 57.2 dB(A) at 10 am-12 pm, 2 pm-5 pm, 5 pm-7 pm and 8 pm-10 pm respectively in the residential area during holiday. Noise pollution level in the study area is exceeded both national and international standard. It can be said that city dwellers' quality of life is being endangered by the noise pollution.