著者

大山 勝 三吉 康郎 荘司 邦夫 山本 真平 谷口 知恵子 渡辺 真吾 井 研治

出版者

The Oto-Rhino-Laryngological Society of Japan, Inc.

雑誌

日本耳鼻咽喉科学会会報 (ISSN:00306622)

巻号頁・発行日

vol.79, no.9, pp.963-972, 1976-09-20 (Released:2008-03-19)

参考文献数

9

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The bone-conducted vowels were picked up by the vibration transducer of the accelerationtype applying to three anatomical sites on the heads (forehead, upper jaw and mastoid region)of the healthy adults.A comparative studies on the speech signals from these three regions of the head were done acoustically. The results were summarized as follows; i) for the pickup of speech signals from the body surface, the vibration transducer of small acceleration type (Rion Co. PV-06)was the most satisfactory in point of a signal-to-noise ratio, intelligibility of the speech and practical use. 2) the relative intensities of the speech signals were decreased in regular order i, u, e, o and a. 3) the spectral characteristics of these vowels were highly similar to those which were recorded from the micropone at the position in the distance of 30 cm from the lips, although there was an inclination of the increased low-frequency components with the decrease of high-frequency in the spectrum. 4) from the results of the articulation score, intelligibility of the vowels was much better in recorded sounds from the upper jaw and forehead compared with that from the mastoid region.

著者

大山 勝 山際 幹和 荘司 邦夫 橋本 真実 古田 茂 小幡 悦朗 三吉 康郎

出版者

耳鼻咽喉科臨床学会

雑誌

耳鼻咽喉科臨床 (ISSN:00326313)

巻号頁・発行日

vol.75, no.8, pp.1681-1689, 1982-08-01 (Released:2011-11-04)

参考文献数

18

被引用文献数

1

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By means of laryngofiberscopy, pneumatography and photoelectric glottography, the closure reflex activity of the larynx which was evoked by trasnasal stimulation with various concentrations of isovaleric acid and ammonia during inspiration was determined in 24 normal subjects and 53 patients with chronic sinusitis, anosmia, nasal allergy and chronic obstructive pulmonary diseases (COPD).The reflex activity was characterized by a remarkable tendency to decrease in the majority of normal older subjects and most of the patients with conditions other than nasal allergy.It was assumed that this reflex might be of great importance in preventing hazardous materials from going into the lung and that depression or absence of the reflex sensitivity in the upper respiratory tract might lead to a higher incidence of pulmonary diseases.The results which were obtained here will help clarify the laryngeal clossure reflex. This methodology may be employed practically to serve as objective olfactometry.