A study on sound quality of vehicle engine sportiness using factor analysis
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DOI 10.1007/s12206-020-0805-0
Journal of Mechanical Science and Technology 34 (9) 2020 Original Article DOI 10.1007/s12206-020-0805-0 Keywords: · Factor analysis · Jury test · Multiple linear regression · Semantic differential method · Sound quality index · Sportiness · Vehicle engine sound
Correspondence to: Yeon June Kang [email protected]
Citation: Park, J. H., Park, H., Kang, Y. J. (2020). A study on sound quality of vehicle engine sportiness using factor analysis. Journal of Mechanical Science and Technology 34 (9) (2020) 3533~3543. http://doi.org/10.1007/s12206-020-0805-0
A study on sound quality of vehicle engine sportiness using factor analysis Jae Hyuk Park, Hansol Park and Yeon June Kang Department of Mechanical Engineering, College of Engineering, Seoul National University, Seoul 151744, Korea
Abstract
For those who enjoy driving, the “sportiness” the engine sound is an important point to consider. However, owing to its abstractness, there is no absolute definition of what sportiness sounds like. Therefore, this study aimed to develop a sound quality index capable of objectively evaluating the sportiness of engine sound based on sound quality research. Objective measurements included the process of recording the sound in the car interior under wideopen-throttle acceleration conditions for 4 vehicles, producing 13 evaluation samples by using various filters based on the recorded data, and calculating the sound metrics of each sample. Subjective evaluation was jointly carried out by 23 evaluators and a semantic differential method was used to find adjectives that could explain the concept and preference for sportiness. The developed index was validated by examining the correlation coefficient through a new sample group. Furthermore, the necessity of factor analysis was also determined.
Received January 30th, 2020 Revised
June 28th, 2020
Accepted July 1st, 2020 † Recommended by Editor No-cheol Park
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
1. Introduction This paper aims to objectively quantify the “sportiness” of engine sound, the predominant source of vehicle noise, by developing a sound quality index for this subjective concept. Prior to currently active studies of sound quality, most studies related to improving the noise and vibration of vehicles have focused on the reduction of the noise interior and exterior to vehicles, and the noise level generated in the vehicle has been continuously reduced owing to the results of ongoing research. However, as the noise was reduced, other types of noise became problematic. In addition, as the psychological and sensory elements of humans are combined because of the complexity of the human auditory function, parameters such as sound quality and sound pressure level must be considered. Moreover, a reduction in noise does not necessarily improve the consumer's perception of vehicle noise simultaneously; in fact, consumer demand for a car that produces a good sound is increasing. Thus, studi
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