Development of a hands‐free electrolarynx for obtaining a human‐like voice using the LPC residual wave

Takeuchi, Masaki; Soejima, Yutaro; Ahn, Jaesol; Lee, Kunhak; Takaki, Ken; Ifukube, Tohru; Yabu, Ken-ichiro; Takamichi, Shinnosuke; Sekino, Masaki

doi:10.1002/eej.23409

Cited by 1 publication

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“…The human voice can be considered a musical instrument in the broadest sense of the word. Still, the human vocal organs are composed of soft muscles, unlike the hard materials of other musical instruments, and the nerves that control these muscles are different from the nerves that control the fingers, lips, and tongue [7][8][9]. It is because of these characteristics that vocal music seems so abstract and raw, with a large degree of intuitive, more subjective feeling rather than objective clarity [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The use and effective analysis of vocal spectrum analysis method in vocal music teaching

Zhang

2024

Applied Mathematics and Nonlinear Sciences

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As computer science and technology continue to evolve and become more pervasive, their application in analyzing the audio spectrum of vocalizations offers valuable insights for vocal music education. This study introduces a method utilizing Fourier transform analysis to examine time-frequency domain signals in vocal teaching. Initially, voice frequencies are collected during vocal music instruction. Subsequently, these frequencies are processed to extract characteristic sequences, which are then reduced in scale to develop a model for voice spectrum recognition tailored to vocal music education. This model facilitates detailed spectral analysis, enabling the investigation of its auxiliary benefits in vocal music teaching, particularly in identifying prevalent instructional challenges. Our findings indicate that during training on vowels “a” and “i,” professional singers’ pitch at 4kHz declined to between −15 and −18 dB, whereas students’ pitch varied around ±6dB, trending upwards. In cases of air leakage, significant gaps were observed at frequencies of 5500Hz, 10500Hz, and 14500Hz. At the same time, students exhibited missing frequencies at 7kHz, 12kHz, and 14kHz during glottal tone production, with pronounced, abrupt peaks occurring when vocal folds were tightly constricted and devoid of excessive links. This research substantiates the theoretical and practical benefits of digital spectrum technology in enhancing vocal music education, thereby providing a scientific and supportive role.

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