Abstract
This study was attempted to improve the sound quality of the small fan for information technology devices such as PC. In order to investigate the relation between various noises emitted from small fan and the design parameters, camber ratio, camber position and wing section of the axial fans were changed. On the other hand, a paired comparison method was chosen for jury test and the results were compared with sound quality metrics. It is known that the annoying feeling has the strong positive correlation with loudness. Therefore, the loudness of the tested fan was kept constant so that the correlation between the annoying feeling and the sound quality other than the loudness can be clarified. As a result, annoying feeling has positive correlation with roughness under the same loudness condition. In addition, it was also found that the roughness was increased with the camber ratio.
