著者

金 海永 鈴木 陽一 高根 昭一 小澤 賢司 曽根 敏夫

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.4, no.2, pp.455-460, 1999-06-30 (Released:2017-02-01)

参考文献数

17

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It has been shown that HRTFs (Head Related Transfer Functions) are important cues for judging the absolute auditory distance of a single sound image when the sound source is close to the listener. In order to investigate the role of HRTFs in auditory distance perception more generally, not only the absolute distance of a single sound image but also the relative distances among multiple sound images should be considered. From this point of view, two kinds of psychoacoustical experiments on absolute and relative distance perception were conducted with the same source signals for stimuli. Comparison of the results of the two experiments showed that while the absolutely judged distance of a sound image increases with the actual distance of sound source up to around 1.2 m, the results of the relative auditory distance perception showed that the perceived distance significantly increases up to 2〜3 m. This difference may be attributable to some perceptual information stored in a short-term memory provided by the comparison of auditory distances between multiple sound images, which could offer an additional cue in relative distance perception, and it may be effective to improve the resolution of the distance perception of sound images at longer distance than the limitation in absolute distance perception.

著者

高根 昭一 安倍 幸治 渡邉 貫治 西口 正之

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.26, no.4, pp.266-276, 2021-12-24 (Released:2021-12-24)

参考文献数

37

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Head-Related Transfer Function (HRTF) is an acoustic transfer function corresponding to sound transmission from a sound source to one’s ear in a free field. Its property depends on sound source position and difference in shapes of individual ear, head and torso and so on. Acquiring the HRTFs of a certain subject for multiple source positions based on measurement demands that the subject stationarily exists in the measurement system for a long time. It brings about serious physical burden to the subject, and causes some variance in the measured HRTFs. In order to resolve this difficulty, a 3D shape of the subject’s head and ears was scanned by using a 3D scanner and a digital camera, and the 3D data of the subject’s head was constructed. This is called “head model” in this paper. Then the head model was printed out by using a 3D printer, and the HRTFs of the subject were measured locating the head model instead of letting the subject be in the measurement system. As a fundamental investigation, a HATS (Head-and-Torso Simulator) was selected as a subject, and its HRTFs and those of its head model were measured in horizontal plane. As a result, the HRTFs measured for the head model of the HATS are an appropriate approximation with those of the HATS itself in the frequency range under 10 kHz, showing the possibility that the head model of the subject can be a substitute for the measurement of the subject’s HRTFs.

著者

日高 幸祐 吉田 凌 渡邉 颯人 吉田 悠真 吉田 森 安倍 幸治 西口 正之 渡邉 貫治 高根 昭一

出版者

秋田県立大学

雑誌

秋田県立大学学生自主研究研究成果

巻号頁・発行日

vol.29, 2018-08

著者

高根 昭一

出版者

一般社団法人日本音響学会

雑誌

日本音響学会誌 (ISSN:03694232)

巻号頁・発行日

vol.65, no.9, pp.505-506, 2009-09-01