Methodology for Sound Quality Analysis of Motors for Automotive Interior Parts through Subjective Evaluation

With the development of autonomous vehicles, activities in the indoor spaces of autonomous vehicles are diversifying. Therefore, as the operating range of the interior parts increases, the occupant becomes sensitive to the operating noise of autonomous vehicles. Therefore, to reduce operating noise,...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2022-09, Vol.22 (18), p.6898
Main Authors: Kim, Sung-Yuk, Ryu, Sang-Chul, Jun, Yong-Du, Kim, Young-Choon, Oh, Jong-Seok
Format: Article
Language:English
Subjects:
Acoustics
Automobiles
automotive
Autonomous vehicles
Electrical noise
interior parts
Methods
motor
Motors
Noise control
Noise sensitivity
Quality assessment
Reliability analysis
Semantics
sensibility
Sound
sound quality
Statistical analysis
Statistical methods
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Summary:With the development of autonomous vehicles, activities in the indoor spaces of autonomous vehicles are diversifying. Therefore, as the operating range of the interior parts increases, the occupant becomes sensitive to the operating noise of autonomous vehicles. Therefore, to reduce operating noise, it is necessary to analyze the causal relationship between the mechanical/electrical noise characteristics of the motor and sound quality. In this paper, we propose a methodology to analyze the relationship between the noise frequency components and the sound quality of small motors used in automobile interior parts. Two types of motors were selected for this study, and noise measurements and analyses were performed by applying the design proposed in this study. Subjective sound quality evaluations were conducted using the 12 pairs of adjectives extracted from the survey. The results suggest that subjective sound quality evaluation scores should be converted to Z-scores to ensure the reliability of the statistical analysis. In addition, we present a critical sound quality value that can be used as a criterion for determining whether the sound quality is positive (good quality) or negative (bad quality). Sound quality regression models explain the causal relationship between rotational frequency components of the motor and subjective sound quality characteristics. Thus, a method for analyzing the effect of the rotational frequency component of the motor on the sound quality is presented, which suggests that it can be used as basic research data to improve the noise performance of the motor.
ISSN:1424-8220
1424-8220
DOI:10.3390/s22186898