Measuring and calculating methods of shakuhachi input admittance
Measuring and calculating methods of shakuhachi input admittance
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尺八输入导纳的测量与计算方法
DOI：
10.1250/ast.6.89
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
Yasushi Ohyagi
中科院分区：
文献类型：
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作者：
Yoshinori Ando;Yasushi Ohyagi
搭建了摇床输入导纳测量系统，并对系统的测量精度进行了详细的测试。然后在与使用该系统测量的各种管子的输入导纳进行比较的基础上，改进了输入导纳的计算方法，以获得足够的有效性，用于尺八或任何其他木管的设计实践。对比中使用的管道是4根带侧孔和不带侧孔的直管和两根真正的Shakuhacis管。测量系统的最大峰值频率误差为5.3厘米，绝对电平误差为2.2分贝。计算的输入导纳峰值频率和电平与实测值的平均偏差分别小于3美分和3分贝。对于相对于第一个峰的较高峰能级以及两个最低峰频率的倍数处的能级，计算值与实测值符合得很好。
The input admittance measuring system for shakuhachis was constructed and its accuracy was examined in detail. Then basing on the comparison with input admittance measurement of various pipes by the use of this system, input admittance calculating method was improved for the purpose of obtaining sufficient validity to be used for design practice of the shakuhachi or any other woodwinds. The pipes used in the comparison were 4straight tubes with and without side holes and two real shakuhachis. The maximum error of the measuring system was estimated to be5.3cent in peak frequency and 2.2 dB in absolute level. The average differences of calculated frequency and level of input admittance peaks from those measured were less than3cent and3dB respectively. As for levels of higher peaks relative to the first peak as well as the levels at the multiples of the two lowest peak frequencies, the calculated values showed well coincidence with those measured.