디젤엔진의 연소소음 음질평가용 인덱스 개발

초록

The present study focused on knocking noises of internal combustion engines. It was shown that the quantification of knocking noise can be calculated by considering time-frequency masking. The knocking noises were synthesized from the characteristics of diesel engine sounds. The subjective rating of these sounds was performed by a jury test. For the objective evaluation, time-frequency masking is applied to the knocking sound signals, and the modulation degree of those signals was calculated. By a correlation test, the diesel sound quality index (DSQI) was developed. The DSQI was successfully applied to the quantification of knocking noise of diesel engines.

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