| Presentation | 2017-03-02 [Poster Presentation] Three-dimensional directivity control based on circular harmonic modes using a circular loudspeaker array Koya Sato, Yoichi Haneda, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper describes a filter design method that enables three-dimensional (3-D) directivity control by using a circular loudspeaker array. Digital filters for the circular array can be designed in the circular harmonic domain as the array is expressed in cylindrical coordinates. However, directivity control in 3-D space cannot be considered because its bases in the circular harmonic domain are expressed only on the x-y plane. Therefore, we measure 3-D directivity patterns when a prototype circular loudspeaker array is driven by each circular harmonic mode. We propose a filter design based on the combination of the measured 3-D directivity patterns as well as a method to suppress filter gains at low frequencies by limiting high order using the L1-norm optimization. We conducted a directivity simulation and a sound distortion experiment to confirm the performance of the proposed method. Our results showed that the proposed method performed better the 3-D directivity control and sound reproduction with little distortion than previous methods. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | circular array / directivity control / circular harmonic expansion / L1-norm / least-squares method |
| Paper # | EA2016-119,SIP2016-174,SP2016-114 |
| Date of Issue | 2017-02-22 (EA, SIP, SP) |
| Conference Information | |
| Committee | SP / SIP / EA |
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| Conference Date | 2017/3/1(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Okinawa Industry Support Center |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Speech, Engineering/Electro Acoustics, Signal Processing, and Related Topics |
| Chair | Kazunori Mano(Shibaura Inst. of Tech.) / Makoto Nakashizuka(Chiba Inst. of Tech.) / Mitsunori Mizumachi(Kyushu Inst. of Tech.) |
| Vice Chair | Hiroki Mori(Utsunomiya Univ.) / Masahiro Okuda(Univ. of Kitakyushu) / Shogo Muramatsu(Niigata Univ.) / Yoichi Haneda(Univ. of Electro-Comm.) / Suehiro Shimauchi(NTT) |
| Secretary | Hiroki Mori(Kobe Univ.) / Masahiro Okuda(Shizuoka Univ.) / Shogo Muramatsu(Ritsumeikan Univ.) / Yoichi Haneda(Chiba Inst. of Tech.) / Suehiro Shimauchi(KDDI R&D Labs.) |
| Assistant | Taichi Asami(NTT) / Kei Hashimoto(Nagoya Inst. of Tech.) / Osamu Watanabe(Takushoku Univ.) / Shigeto Takeoka(Shizuoka Inst. of Science and Tech.) / TREVINO Jorge(Tohoku Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Speech / Technical Committee on Signal Processing / Technical Committee on Engineering Acoustics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Poster Presentation] Three-dimensional directivity control based on circular harmonic modes using a circular loudspeaker array |
| Sub Title (in English) | |
| Keyword(1) | circular array |
| Keyword(2) | directivity control |
| Keyword(3) | circular harmonic expansion |
| Keyword(4) | L1-norm |
| Keyword(5) | least-squares method |
| 1st Author's Name | Koya Sato |
| 1st Author's Affiliation | The University of Electro-Communications(UEC) |
| 2nd Author's Name | Yoichi Haneda |
| 2nd Author's Affiliation | The University of Electro-Communications(UEC) |
| Date | 2017-03-02 |
| Paper # | EA2016-119,SIP2016-174,SP2016-114 |
| Volume (vol) | vol.116 |
| Number (no) | EA-475,SIP-476,SP-477 |
| Page | pp.pp.213-218(EA), pp.213-218(SIP), pp.213-218(SP), |
| #Pages | 6 |
| Date of Issue | 2017-02-22 (EA, SIP, SP) |