Input admittance of shakuhachis and their resonance characteristics in the playing state.
Input admittance of shakuhachis and their resonance characteristics in the playing state.
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尺八的输入导纳及其演奏状态下的共振特性。
DOI：
10.1250/ast.7.99
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
Yoshinori Ando
中科院分区：
文献类型：
--
作者：
Yoshinori Ando
用本文提出的计算方法，得到了四种类型六种尺八的输入导纳曲线。本文测量了吹奏时的基音频率，找出了基音频率与输入导纳峰值频率的关系，并由此计算了吹奏状态下口端产生的声惯量的大小和共振曲线。对于共振曲线最低两个峰值频率的倍数处的电平，估计了其平均基音频率每变化20分的变化率。在低、高倍频程中的变化率分别约为3.0dB和3.6dB。这个速率表明了所演奏音调的谐波水平随音高控制技术如“梅里”或“卡里”的表现而变化的程度。基于这些值，讨论了针对音高控制的音乐表达所期望的共振频率的布置。
By the calculating method reported in the previous paper, the input admittance curves of six shakuhachis of 4 types were obtained. In this paper, the played pitch frequencies were measured and their relation to the correspondent peak frequencies of input admittance was found. From this relation, the magnitude of the acoustic inertance generated at the mouth end and resonance curves under the playing state were calculated. As for the levels at the multiples of the lowest two peak frequencies of resonance curve, their average varying rate per 20 cents change of the pitch frequency was estimated. The rate is about 3.0 dB and 3.6 dB in the lower and higher octave respectively. This rate suggests how much the harmonic levels of played tones vary with the performance of the pitch control techniques as "meri" or "kari." Based on these values, the arrangement of resonance frequencies which is desirable for the musical expression aimed in pitch control was discussed.