@article{oai:shinshu.repo.nii.ac.jp:00001887,
 author = {野村, 寿男 and 伊藤, 正明 and 内田, 昌治 and 矢島, 芳明 and 鷹股, 哲也},
 issue = {1},
 journal = {松本歯学},
 month = {Apr},
 note = {Noise reduction of an air turbine hand piece in general practice helps to reduce a patient's physical and psychological pain and suffering. The relationship has not been determined between the wing shape of an air turbine hand piece and noise. This study was conducted to evaluate the relationship between the noise of an air turbine hand piece and wing shapes, rotational frequencies and torque. The results were as follows; 1. The actual frequency of an air turbine hand piece whose pneumatics were changed from 0.5kgf/cm^2 to 3.0kgf/cm^2 almost coincided with predicted measurements. The results suggested that the noise of an air turbine hand piece was similar to an air blower piece. Furthermore, the kind of noise was nearly equal to that of the rotational noise of a moving blade. There was no evidence of a relationship between frequencies and wing shape. 2. When comparing standard and small types of turbine wings regarding rotational frequency the latter was less than 2.5kgf/cm^2. 3. Increased rotational frequencies were observed when the back of the turbine wings was slightly thinned. Rotational noises also increased with this type. 4. It was suggested that to maintain the torque of an air turbine hand piece a concave wing and closed structure should be used., application/pdf},
 pages = {58--71},
 title = {歯科用エアータービン・ハンドピースの静音設計に関する検討 : 第1報 異なる形態のタービン翼の騒音測定と評価方法について},
 volume = {24},
 year = {1998}
}