Abstract
This study is to establish new evaluation scales of sound quality which is more suitable for the human sense of hearing than the conventional evaluation scales such as A-weighted sound pressure level. The authors focus on turbomachinery noise and have investigated the meaning space of its sound quality by hearing tests and factor analyses. The hearing tests were performed using semantic differential (SD) method and their test results were analyzed to extract dominant factors of the fan noise sound quality. In addition to the factor analyses, influence of noise level and 1⁄3 octave band level on sound quality of turbomachinery noise was also investigated.
