Assessment of Acoustical Performance of Residential Buildings for Sustainable Liveability and Satisfaction in Awka, Anambra State Nigeria

Abstract

This study assessed the acoustical performance of residential buildings in Awka, Anambra State to determine the level of satisfactions of the occupants. The study surveyed the residential buildings and distributed questionnaires to the users and occupiers of different classes of residential buildings. The results of the survey were analysed using Means Satisfaction Index (MSI) and Relative Performance Index (RPI) to assess the level of satisfaction of the occupants of the buildings and the acoustical performance of the buildings respectively based on 12 selected acoustic performance criteria. It further used Pearson Product Moment Correlation to establish the relationship between occupants’ level of satisfaction and acoustic performance of the buildings. The study found that the overall acoustic performance of the buildings was grossly poor and unsatisfactory with average RPI of 0.35. It also found that the residents were very dissatisfied with the acoustic performance of the buildings in which they live (average MSI =1.74). The study further found that there was significant positive relationship between the occupants’ level of satisfaction and acoustic performance of the buildings with a Coefficient Correlation (r) of 0.875 and a computed t-test value of 5.708 which is greater than the critical t- value (2.228) tested at 5% significance level. The Coefficient of Determination (R2 = 0.7567) then suggested that about 75.69% level of satisfaction of the occupants of the residential buildings in Awka could be triggered by the acoustic performance of the buildings in which they live. On this evidence, the study craves for the enforcement of the provisions of the National Building Code as regards to sound control in buildings. In addition, there is need for adoption of different strategies for improving acoustics performance of buildings such as absorption, mechanical decoupling, mechanical damping, blocking, covering, etc., so as to promote good acoustic practices that would improve sustainable performance of our buildings and decline the resulting consequences of sounds in our residential buildings.