2024-11-12T02:57:22Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02001473
2022-10-31T00:48:55Z
1642837622505:1642837745608:1642837760806
1642838403551:1642838405037
即時応答型音程トレーナーの為の周波数解析手法について
Real-Time Response Pitch Discrimination Training System : A Pitch Computing Method
仲間, 正浩
Nakama, Masahiro
open access
It is meaningful to develop a Real-Time Response Pitch Descrimination System by utilizing a computing sound pitch. There are many approaches in computing sound pitch. But, no approach was seen in developing enough response-time and accuracy of frequency discrimination for pitch discrimination training. Therefore new methodology is considered to improve response-time and accuracy of frequency discrimination. In FFT (Fast Fourier Transformation), there exist mathematical relations such that\n(1) time_range_of_analysis^*frequency_discrimination = 1 and\n(2) response_time = time_range_of_analysis/2^*computing_time,\nwhich shows no improvement in both response-time and accuracy of frequency discrimination. Fortunately, there exist the fact such that many peaks of power spectrum : f[Hz], f^*2[Hz], f^*3[Hz], ･･････ as the results of FFT from a single f[Hz] pitch sound.\nTo improve both response-time and accuracy of frequency discrimination, the following new method is considered in this paper. Step1 : Compute pitch roughly from f[Hz] power spectrum peak. Step2 : Compute pitch accurately from f^*n[Hz].
紀要論文
琉球大学
1994-10-31
jpn
departmental bulletin paper
NA
http://hdl.handle.net/20.500.12000/1374
http://hdl.handle.net/20.500.12000/1374
https://u-ryukyu.repo.nii.ac.jp/records/2001473
0386-5738
AN10144831
琉球大学教育学部紀要 第一部・第二部
45
411
418
https://u-ryukyu.repo.nii.ac.jp/record/2001473/files/Vol45p411.pdf