• 한국소음진동공학회논문집
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• 제22권3호
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• pp.234-243
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• 2012

In this paper, a sound quality indices for the evaluation of vehicle intake and exhaust noise were developed through a correlation analysis of objective measurement data and subjective evaluation data. At first, intake and exhaust orifice noise were measured at the wide-open throttle sweep condition. And then, acoustic transfer function between intake orifice noise and interior noise at the steady state condition was measured. Also, acoustic transfer function for exhaust system was measured as the same method. Simultaneously, subjective evaluation was carried out by the paired comparison and semantic differential method by 27 engineers. Next, the correlation analysis between the psycho-acoustic parameters derived from the measured data and the subjective evaluation was performed. The most critical factor was determined and the corresponding sound quality index for the intake and exhaust noise was obtained from the multiple factor regression method. At last, the effectiveness of the proposed index was investigated.

• 한국소음진동공학회논문집
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• 제15권8호
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• pp.945-953
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• 2005

The purpose of this paper is to develop a linear regression model for the sound quality index of vehicle Interior noise. For this, objective measurement data of the vehicles driving in acceleration was measured. On the basis of analysis, psychoacoustic parameters were extracted and subjective evaluation was performed by noise and vibration expert evaluators. For the subjective evaluation, the paired comparisons and the semantic differential methods were used to evaluate sound quality of vehicle interior noise. By the paired comparison which evaluate two pairs of vehicle interior noise, the preference was estimated. With the semantic differential and the factor analysis, it was evaluated words of two pairs which expressed appropriately the sense of evaluator about noise source. Therefore the characteristics of the sound qualify for the vehicle were differentiated. From the results of both the correlation analysis and the multiple factor regression analysis, the sound quality evaluation model for the sense of human hearing was derived and indexed.

• 한국항만경제학회지
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• 제38권4호
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• pp.65-85
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• 2022

본 연구에서는 디지털 시대의 항만을 뜻하는 스마트 항만의 지속가능성 영역과 지표의 우선순위를 도출하기 위하여 선행 연구들과 최근 전 세계적으로 전 산업에서 필수불가결하게 도입하고 있는 ESG를 함께 연구하였다. 운영, 환경, 사회, 지배구조 등 4가지의 영역의 상위 평가항목과 20개의 하위 평가항목으로 계층구조를 설정하였고 AHP 기법 중에서 항목들의 가중치를 매기는 상대적 평가방법을 적용하였다. 쌍대비교 설문지를 Satty(1980)가 제안한 9점 척도로 구성하였다. 국내 대표적인 4개의 항만공사(부산, 인천, 울산, 여수광양)에서 지속가능성 혹은 ESG 관련 업무를 수행하는 실무 종사자들을 대상으로 설문조사를 실시하였다. 분석 결과의 정확도를 높이기 위하여 일관성 비율이 0.1이하인 17부의 설문을 대상으로 AHP 분석을 실시하였다. 분석결과, 국내 스마트 항만의 지속가능성을 나타내는 4가지 영역 중 운영 영역의 우선순위가 제일 높았고, 그 다음으로 환경 영역임을 확인 할 수 있었다. 또한 20개 세부지표들에 대한 종합우선 순위를 살펴보면 운영 효율성, 운영 계획, 에너지 관리, 오염 측정 및 관리체계 등의 지표가 우선순위가 높은 것으로 나타났다. 반면 사회 영역과 지배구조 영역은 다른 영영들에 비해서 상대적 중요도가 낮은 것을 확인할 수 있었다.