A Comprehensive Evaluation Model of Electric Bus Interior Acoustic Comfort and Its Application

In this paper, 64 noise samples from eight electric buses are acquired and their corresponding acoustic comfort ranks (ACRs) are obtained by subjective evaluation tests with the method of rank score comparison (RSC). To overcome a current problem that the overall sound quality of an electric bus cannot be measured by single noise sample, a comprehensive evaluation model for interior acoustic comfort is established using fuzzy comprehensive evaluation and analytic hierarchy process (FCE-AHP). The model is based on a three-level evaluation index system with two conditions of air conditioning on and off, two observation positions of driver and rear seat, and two constant speeds of 30 km/h and 50 km/h. AHP is used to calculate the weight coefficient of each evaluation index. In addition, the ACRs of 64 noise samples are brought into the established model to gain overall sound quality order of eight electric buses. As a result, based on the subjective evaluation tests and calculation results, the application of the established comprehensive acoustic comfort model is ultimately realized.