| Presentation | 2021-11-16 [Poster Presentation] Mode-matching with energy constraint of loudspeakers based on analytical approach Yuki Kawasaki, Makoto Otani, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Higher-Order Ambisonics (HOA) is a method of sound field reproduction, which usually uses mode matching to control expansion coefficients in the spherical harmonic domain. In HOA, the area of the reproduction region shrinks with increasing frequency when the truncation order is constant. When the reproduction region is smaller than the listener’s head, binaural signals observed in the reproduced field are degraded, especially at the contralateral ear to an arrival direction of wavefronts from a primary source in the primary field. First, this paper numerically shows that the reproduction error at the contralateral ear is caused by the excessively large driving signal level of secondary sources located at positions not corresponding to the direction of arrival of the primary-source wavefronts. Next, this paper proposes a method to suppress the large driving signal level by weighting the driving signal of each secondary source in the mode matching. The proposed method determines weighting coefficients based on the driving signal at each secondary source position derived from an analytical HOA assuming a continuous distribution of secondary sources. The numerical simulation reveals that the proposed method reduces the reproduction error of the signal at the contralateral ear by suppressing the driving signal level of the secondary sources. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | sound field reproduction / Higher-Order Ambisonics / spherical harmonic analysis / Mode-Matching method |
| Paper # | EA2021-49,EMM2021-76 |
| Date of Issue | 2021-11-08 (EA, EMM) |
| Conference Information | |
| Committee | EMM / EA / ASJ-H |
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| Conference Date | 2021/11/15(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | [Beginners Session] Engineering/Electro Acoustics, Content Processing, Digital Watermarking, Psychological and Physiological Acoustics, and Related Topics |
| Chair | Ryoichi Nishimura(NICT) / Yoshinobu Kajikawa(Kansai Univ.) / 加藤 宏明(NICT) |
| Vice Chair | Masaaki Fujiyoshi(Tokyo Metropolitan Univ.) / Masatsugu Ichino(Univ. of Electro-Comm.) / Kenichi Furuya(Oita Univ.) / Shoichi Koyama(Univ. of Tokyo) / 坂本 修一(東北大) |
| Secretary | Masaaki Fujiyoshi(Utsunomiya Univ.) / Masatsugu Ichino(NICT) / Kenichi Furuya(NTT) / Shoichi Koyama(RitsumeikanUniv.) / 坂本 修一(東大) |
| Assistant | Shoko Imaizumi(Chiba Univ.) / Youichi Takashima(Kaishi Professional Univ.) / Yukou Wakabayashi(Tokyo Metropolitan Univ.) / Tatsuya Komatsu(LINE) |
| Paper Information | |
| Registration To | Technical Committee on Enriched MultiMedia / Technical Committee on Engineering Acoustics / Auditory Research Meeting |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Poster Presentation] Mode-matching with energy constraint of loudspeakers based on analytical approach |
| Sub Title (in English) | |
| Keyword(1) | sound field reproduction |
| Keyword(2) | Higher-Order Ambisonics |
| Keyword(3) | spherical harmonic analysis |
| Keyword(4) | Mode-Matching method |
| 1st Author's Name | Yuki Kawasaki |
| 1st Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 2nd Author's Name | Makoto Otani |
| 2nd Author's Affiliation | Kyoto University(Kyoto Univ.) |
| Date | 2021-11-16 |
| Paper # | EA2021-49,EMM2021-76 |
| Volume (vol) | vol.121 |
| Number (no) | EA-246,EMM-247 |
| Page | pp.pp.128-133(EA), pp.128-133(EMM), |
| #Pages | 6 |
| Date of Issue | 2021-11-08 (EA, EMM) |