作者：张国庆, 李翔
作者单位：深圳市计量质量检测研究院, 广东深圳 518055
关键词：音准仪; 标准音高; 不确定度; 频率偏差与音程偏差的互换; 关键影响量
摘要：
本文从音准仪的定义、使用范围的表述引伸到不确定度评定时典型参数和单位与量的选择、数学模型的确定以及测量方法的简单论述,并选择了比较常用具有代表性的指针式音准仪进行校准和不确定评定。对标准音高测量重复性进行A类评定的标准不确定度与采用B类方法评定的音准仪标准音高指示零线重合偏差标准不确定度之间的相关性进行了讨论。通过不确定度评定实例,得到肯定结论:频率最大允许误差为n10-6、分辨力为1mHz的频率合成标准信号发生器可以校准允差为1音分或2音分的指针式音准仪;指出影响测量扩展不确定度的两个关键因素并为校准更高准确度的音准仪给出了有效方法和关键措施。
Discussion on uncertainty at calibrating tonometer' s standard musical pitch
ZHANG Guo-qing, LI Xiang
Shenzhen Academy of Metrology and Quality Inspection, Shenzhen 518055, China
Abstract: This paper included selection of typical parameters, units, quantities and mathematical mode in tonometer uncertainty evaluation. Then discussed measurement method, used the representative arrow tonometer to perform the calibration and evaluation of uncertainty and concluded that:for arrow type tonometer, the uncertainty within ±1 cent, or ±2 cent mpe can be calibrated reliably by a frequency synthesis standard generator with ±n *106 mpe and 1mHz resolution; The paper point out the two key influence quantities that determine the value of the expanded uncertainty of measurement and gave effective methods and key measures for calibrating the tonometer with higher accuracy.
Keywords: Tonometer; Standard musical pitch; Uncertainty; Exchange for frequence deviation and pitcle interval deviation; Key influence quantity
2005, 31(6): 77-79,96 收稿日期: 2005-7-5;收到修改稿日期: 2005-9-24
基金项目:
作者简介:
参考文献
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