| 研究課題/領域番号 |
22K17904
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| 研究種目 |
若手研究
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| 配分区分 | 基金 |
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| 審査区分 |
小区分61010:知覚情報処理関連
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| 研究機関 | 千葉大学 |
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研究代表者 |
IRWANSYAH 千葉大学, フロンティア医工学センター, 特任助教 (60929818)
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| 研究期間 (年度) |
2022-04-01 – 2024-03-31
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| 研究課題ステータス |
完了 (2023年度)
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| 配分額 *注記 |
3,770千円 (直接経費: 2,900千円、間接経費: 870千円)
2023年度: 1,560千円 (直接経費: 1,200千円、間接経費: 360千円)
2022年度: 2,210千円 (直接経費: 1,700千円、間接経費: 510千円)
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| キーワード | Bone Conduction / Crosstalk / Bone Transducer / Cancellation / Binaural Hearing / Silicone Pinna / Cartilage Conduction / bone conduction / crosstalk / binaural hearing / bone transducer / cancellation |
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| 研究開始時の研究の概要 |
A bone-conduction (BC) sound presented on either side of the head reaches the cochlea in both ears. This “crosstalk” phenomenon is considered one factor limiting the ability to understand the surroundings better with two ears when using a pair of BC hearing devices. This project proposes an implementation of the “crosstalk cancellation” method on the human head as a solution to suppress BC “crosstalk” sounds. In this study, psychoacoustic tests will be carried out to confirm the effectiveness of the proposed crosstalk cancellation system.
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| 研究実績の概要 |
In bone conduction (BC) hearing, there is a problem known as "crosstalk." This occurs when sound vibrations directed to one ear are perceived by the other ear, which potentially interferes with binaural hearing. Our project aims to address this issue by canceling these crosstalk vibrations. In the fiscal year 2023, we thus concentrated on the following items::
(1) Crosstalk Cancellation at an Accelerometer on the Mastoid: We evaluated crosstalk through subjective hearing threshold tests. Our results indicate that a reduction in vibrations behind the pinna (mastoid) could result in a decrease in crosstalk at the cochlea.
(2) Manual Tuning of Phase and Level of Pure Tones: Building on the approach proposed in (1), designed to cancel crosstalk at the accelerometer, we developed an enhanced method. After the initial approach (1) was applied, the level and phase of the crosstalk cancellation filter had to be manually adjusted by the subjects through a lateralization task. This fine-tuning of the filter resulted in successful crosstalk cancellation at the cochlea.
(3) Ballistic Dummy Head Study: We also conducted a crosstalk cancellation experiment on a ballistic dummy head with synthetic skin and bone in order to compare with the results from the human subjects.
(4) Silicone Pinna Model: We expanded our study by creating a silicone pinna model. This model facilitates the investigation of BC sounds transferring from the vibrator attached to the pinna to the accelerometer.
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