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Tong, Taiwan

Wu H.,Tong Nan University | Hung C.F.,National Taiwan University | Chang S.H.,National Taiwan University | Wang W.H.,National Taiwan Ocean University | Cheng C.Y.,National Taiwan Ocean University
40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 | Year: 2011

Owing to the complexity of human audition, the hearing sensation cannot represent only by the sound level alone. Beside sound volume, the complete evaluation of an environmental sound quality still need to cite some other psychoacoustic parameters such as loudness, sharpness, fluctuation, tonality and roughness etc. The assessment criterion of annoyance of an acoustic environment can be established by means of statistical analysis of the results of jury test for subjective hearing sensation. In this paper, the evaluation modeling of the indoors sound quality a number of habitat spaces, including a generic resident house, a small suite, a small office and a medium size conference room, is established by utilizing a binaural head/torso simulator and jury test. The head/torso simulator is used to measure and record the psychoacoustic parameters so as to reproduce the sound field, while the jury test is carried out on 20 examinees to listen several kinds of compound sound sources, such as noise combined of exhauster, fan, talk and knocking noise generated in the above-mentioned habitat spaces respectively. By means of the ranking process, paired comparison, category judgment and semantic differential test of the subjective jury test results, the range of psychoacoustic parameters regarding the various extent of annoyance has been attained. In addition, the countermeasure to improve the sound quality and the effectiveness of a specified exhauster are also discussed. Source

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