| Presentation | 2016-03-29 [Poster Presentation] Design of a directive loudspeaker array filter based on weighted least-squares method by controlling window function for desired sound pressure Koya Sato, Takayuki Seki, Yoihi Haneda, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this study, we investigate a circular loudspeaker array (which typically is a watch type wearable terminal) with few sound leakages into the neighborhood for directivity control. We used a multi-point control method, which can be used to set a desired sound pressure to control directivity in detail.A multi-point control method can generate high directivity in the target direction, while sidelobes appear in other directions. When the intensity of sidelobes is high it results in sound leakage.Therefore, we propose a novel algorithm that can suppress sidelobes by setting smooth desired sound pressures around a loudspeaker array using a window function. Moreover, we introduced a technique for suppressing sidelobes using the weighted least-squares method. Next, we conducted directivity simulations using a cylindrical loudspeaker array based on the proposed method.Results indicated that although the beam width of the directivity became wider, sidelobe suppression was achieved through the proposed method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | loudspeaker array / directivity control / multi-point control method / least-squares method / window function |
| Paper # | EA2015-106,SIP2015-155,SP2015-134 |
| Date of Issue | 2016-03-21 (EA, SIP, SP) |
| Conference Information | |
| Committee | EA / SP / SIP |
|---|---|
| Conference Date | 2016/3/28(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Beppu International Convention Center B-ConPlaza |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Engineering/Electro Acoustics, Speech, Signal Processing, and Related Topics |
| Chair | Yoichi Haneda(Univ. of Electro-Comm.) / Kazunori Mano(Shibaura Inst. of Tech.) / Osamu Houshuyama(NEC) |
| Vice Chair | Yukio Iwaya(Tohoku Gakuin Univ.) / Mitsunori Mizumachi(Kyushu Inst. of Tech.) / Norihide Kitaoka(Tokushima Univ.) / Makoto Nakashizuka(Chiba Inst. of Tech.) / Masahiro Okuda(Univ. of Kitakyushu) |
| Secretary | Yukio Iwaya(NTT) / Mitsunori Mizumachi(KDDI R&D Labs.) / Norihide Kitaoka(Tokyo City Univ.) / Makoto Nakashizuka(Kobe Univ.) / Masahiro Okuda(NEC) |
| Assistant | Shoichi Koyama(Univ. of Tokyo) / Takashi Nose(Tohoku Univ.) / Taichi Asami(NTT) / Takamichi Miyata(Chiba Inst. of Tech.) |
| Paper Information | |
| Registration To | Technical Committee on Engineering Acoustics / Technical Committee on Speech / Technical Committee on Signal Processing |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Poster Presentation] Design of a directive loudspeaker array filter based on weighted least-squares method by controlling window function for desired sound pressure |
| Sub Title (in English) | |
| Keyword(1) | loudspeaker array |
| Keyword(2) | directivity control |
| Keyword(3) | multi-point control method |
| Keyword(4) | least-squares method |
| Keyword(5) | window function |
| 1st Author's Name | Koya Sato |
| 1st Author's Affiliation | The University of Electro-Communications(UEC) |
| 2nd Author's Name | Takayuki Seki |
| 2nd Author's Affiliation | The University of Electro-Communications(UEC) |
| 3rd Author's Name | Yoihi Haneda |
| 3rd Author's Affiliation | The University of Electro-Communications(UEC) |
| Date | 2016-03-29 |
| Paper # | EA2015-106,SIP2015-155,SP2015-134 |
| Volume (vol) | vol.115 |
| Number (no) | EA-521,SIP-522,SP-523 |
| Page | pp.pp.219-224(EA), pp.219-224(SIP), pp.219-224(SP), |
| #Pages | 6 |
| Date of Issue | 2016-03-21 (EA, SIP, SP) |