1 0 0 0 OA 音方向感の研究
- 著者
- 及川 尚
- 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.93, no.3, pp.361-372, 1990-03-20 (Released:2008-03-19)
- 参考文献数
- 16
- 被引用文献数
- 1
I. ObjectiveThe present study was undertaken in order to determine the onset of monaural deafness, especially whether it is congenital or acquired, making an investigation into the sense of sound direction in monaural hearing impairment and monaural deafness and compairing them between hearing-impaired patients and normal hearers.II. SubjectsThis study was carried out on 26 patients with monaural hearing impairment, 22 patients with monaural deafness and 10 normal hearers.III. MethodsA circle with a radius of 1.3m was drawn around a fixed patient's position in a sound proof room, and the circle was divided into 16 directions at an equal angle of 22.5°. A blindfolded hearer was instructed to listen to a speaker for white noise of 60dB (A) for one second and verbally answer in which direction he heard the noise. The normal hearers were tested in 4-, 8-, and 16-directions, and the hearing-impaired patients were tested in only 8-directions.IV. Results1. Normal HearersThe rate of correct answers decreased with increasing directions of sound.The incorrect answers in 4-direction testing were only confusion between forward and backward directions, and similar incorrect answers were made in 8- and 16-direction testing. All other incorrect answers were errors of less than 45°.2. Monaurally Hearing-impaired PatientsThe rate of correct answers on the whole was low.There was such a relationship between the rate of correct answers and the mean hearing level of patients that the total rate of correct answers decreased with increasing hearing impairment. This correlation was statistically significant, and there was a still more significant correlation between the degree of hearing impairment and the rate of correct answers as to the right and left directions.Incorrect answers were errors of90° or less on the healthy side, while errors were made for all directions on the affected side.3. Monaurally Deaf PatientsThe rate of correct answers was by far lower on the affected side.Whereas many errors were within 45° on the healthy side, errors were made for all directions on the affected side.Judging from the onset of hearing loss, the monaurally deaf patients were divided into a group of 8 patients who obviously had sudden aquired deafness and a group of 9 patients who were presumed to have congenital monaural deafness. The mean rate of correct answers of the former group was superior to the latter group's, particularly on the effected side.
透明性,耐熱性の高いダブルデッカー型シルセスキオキサンをベースポリマーとして,表面改質効果を有するパーフルオロアルキル基含有シルセスキオキサンを複合化することにより,耐熱・光学コーティング膜を作製した。得られたコーティング膜は,接触角測定による表面特性,分光透過率測定による光学特性,熱重量分析による熱物性評価を行い,表面特性制御効果,及びバルク特性への影響を評価した。その結果,わずかなパーフルオロアルキル基含有シルセスキオキサンの添加により,膜の表面特性をコントロールできることが確認された。また,得られたコーティング膜の透明性,耐熱性は,パーフルオロアルキル基含有シルセスキオキサンの添加による低下は見られず,バルク特性にはほとんど影響しないことが分かった。更に,得られたコーティング膜は近紫外線領域の透明性が高く,近紫外線の吸収の少ないことによる耐光性に優れた膜であることが示めされた。また,得られたコーティング膜の樹脂成分は300℃以上の耐熱性を有しており,優れた耐熱性,透明性を保持しつつ,かつ表面特性のみをコントロールすることができることが確認された。