@article{oai:nagoya.repo.nii.ac.jp:00031613,
 author = {Ochiai, Yoshiyuki and Fukumura, Teruo},
 issue = {2},
 journal = {Memoirs of the Faculty of Engineering, Nagoya University},
 month = {Feb},
 note = {This is some study of attempt concerning what is called timbre quality. Vocalic voice is brought here to the front as its home question. This study does not mean therefore one-sided analysis of vowel sound only physically viewed. This is not the mere faithful description of the harmonic components contained in sustained vowel. In order to understand in full the vocalic timbre, that is the most important in the interpretation of transmission quality of speech-transmission systems, phonal structure and vocal pattern are obtained and discussed here. As what is available for the connection of these two qualities, invariant formant comes to the surface. For representation of vocalic timbre, the terms, such as vocal alps, vocal summit and vocal glen are used. For the same purpose, white phone and white voice are also provided for. Whispered vowels and devocalized voices are also investigated. It will be worth noting that this timbre study of vowels, starting from the conceptional analysis of transmission quality, was carried out conforming to the experimental plan drawn up three years since. We have led some conclusion and have discussed thereupon, basing on the material of 1287 oscillograms obtained for analysis.},
 pages = {253--280},
 title = {Timbre study of vocalic voices},
 volume = {5},
 year = {1954}
}