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http://dx.doi.org/10.7855/IJHE.2013.15.6.079

A Study on Development of the Prediction Model Related to the Sound Pressure in Terms of Frequencies, Using the Pass-by and NCPX Method  

Kim, Do Wan (서울과학기술대학교 건설공학과)
Mun, Sungho (서울과학기술대학교 건설공학과)
An, Deok Soon (한국건설기술연구원)
Son, Hyeon Jang (한국건설기술연구원)
Publication Information
International Journal of Highway Engineering / v.15, no.6, 2013 , pp. 79-91 More about this Journal
Abstract
PURPOSES : The methods of measuring the sound from the noise source are Pass-by method and NCPX (Noble Close Proximity) method. These measuring methods were used to determine the linkage of TAPL (Total Acoustic Pressure Level) and SPL (Sound Pressure Level) in terms of frequencies. METHODS : The frequency analysis methods are DFT (Discrete Fourier Transform) and FFT (Fast Fourier Transform), CPB (Constant Percentage Bandwidth). The CPB analysis was used in this study, based on the 1/3 octave band option configured for the frequency analysis. Furthermore, the regression analysis was used at the condition related to the sound attenuation effect. The MPE (Mean Percentage Error) and RMSE (Root Mean Squared Error) were utilized for calculating the error. RESULTS : From the results of the CPB frequency analysis, the predicted SPL along the frequency has 99.1% maximum precision with the measured SPL, resulting in roughly 1 dB(A) error. The TAPL results have precision by 99.37% with the measured TAPL. The predicted TAPL results at this study by using the SPL prediction model along the frequency have the maximum precision of 98.37% with the vehicle velocity. CONCLUSIONS : The Predicted SPL model along the frequency and the TAPL result by using the predicted SPL model have a high level of accuracy through this study. But the vehicle velocity-TAPL prediction model from the previous study by using the log regression analysis cannot be consistent with the TAPL result by using the predicted SPL model.
Keywords
FFT(Fast Fourier Transform) analysis; CPB(Constant Percentage Bandwidth) analysis; Regression analysis; MPE(Mean Percentage Error); RMSE(Root Mean Squared Error); SPL(Sound Pressure Level); TAPL(Total Acoustic Pressure Level);
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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