| Presentation | 2004/12/10 A study on the limitation of precedence effect and echo threshold in sound localization Toshio HARIMA, Koji ABE, Shouichi TAKANE, Toshio SONE, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In sound field in a room, reflected sounds arrive at listener's ears from various directions with respective time delays. Even under these conditions, a listener can usually localize the sound source at its correct position. This phenomenon is well known as the precedence effect. The precedence effect depends not only on the arrival time of delayed sounds but also on their directions, levels and stimulus duration. The temporal boundary when they cause one fused sound image or two separate sound images, is often called the echo threshold. In this study the influence of the characteristics of stimulus sound, the direction and time delay of the secondary sounds on the precedence effect were examined. The stimulus sounds used for the experiment were pink noise of 2s duration and speech sound. As a result, a time difference between the preceding and the following sounds decides the sound localization within the range of about 0.1～0.7ms and, furthermore, the sound image is localized on the preceding sound for the time delay from about 0.7 to 8ms, and on the following sound from about 8 to 17ms. Then, it confirmed that the echo threshold was found at about 17～25ms except for the secondary sound coming from the loudspeaker located at 180° angle. But, when the results were observed in detail, a little difference was seen in the behavior of the precedence effect and the echo threshold according to the kind of the stimulus sound. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | precedence effect / sound localization / interaural time difference / interaural level difference / echo threshold / acoustic stimulation |
| Paper # | HIP2004-75 |
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| Conference Information | |
| Committee | HIP |
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| Conference Date | 2004/12/10(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Human Information Processing (HIP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study on the limitation of precedence effect and echo threshold in sound localization |
| Sub Title (in English) | |
| Keyword(1) | precedence effect |
| Keyword(2) | sound localization |
| Keyword(3) | interaural time difference |
| Keyword(4) | interaural level difference |
| Keyword(5) | echo threshold |
| Keyword(6) | acoustic stimulation |
| 1st Author's Name | Toshio HARIMA |
| 1st Author's Affiliation | Tohoku Institute of Technology, Department of information and Communication Engineering.() |
| 2nd Author's Name | Koji ABE |
| 2nd Author's Affiliation | Akita Prefectural University, Faculty of Systems Science and Technology, Department of Electronics and Information Systems. |
| 3rd Author's Name | Shouichi TAKANE |
| 3rd Author's Affiliation | Akita Prefectural University, Faculty of Systems Science and Technology, Department of Electronics and Information Systems. |
| 4th Author's Name | Toshio SONE |
| 4th Author's Affiliation | Akita Prefectural University, Faculty of Systems Science and Technology, Department of Electronics and Information Systems. |
| Date | 2004/12/10 |
| Paper # | HIP2004-75 |
| Volume (vol) | vol.104 |
| Number (no) | 526 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |