| Presentation | 2019-12-12 Performance evaluation of a non-linear beamformer with a small-scale microphone array Ryoutarou Oka, Mitunori Mizumachi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Beamforming has been one of the most important techniques in noise reduction under adverse acoustic environments. Traditional beamformers were designed in analytical and adaptive schemes. On the other hands, recent neural network-based beamformers achieve the great success in signal enhancement. The authors have also proposed a broadband neural network-based beamformer, which can deal with wide-band speech signals. The performance of the proposed beamformer was confirmed in computer simulation with an 8-ch equally-spaced linear microphone array, of which the spacing between neighboring microphones was 10 cm, respectively. In this paper, the performance of the proposed beamformer is evaluated with a hand-held small-scale microphone array, which is developed with miniature MEMS microphones. It is confirmed that the nonlinear beamformer could sharpen the main lobe even with the small-scale microphone array, although an analytical linear beamformer, that is, delay-and-sum beamformer, could not achieve signal enhancement. It is considered that the nonlinear neural network-based beamformer could enhance minute differences in amplitude and phase among multi-channel observations. Keywords Noise, reduction, Non-linear beamforming, MEMS microphone array |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Noise reduction / Non-linear beamforming / MEMS microphone array |
| Paper # | EA2019-72 |
| Date of Issue | 2019-12-05 (EA) |
| Conference Information | |
| Committee | EA |
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| Conference Date | 2019/12/12(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kyushu Inst. Tech. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Engineering/Electro Acoustics, and Related Topics |
| Chair | Kenichi Furuya(Oita Univ.) |
| Vice Chair | Suehiro Shimauchi(Kanazawa Inst. of Tech.) / Shigeto Takeoka(Shizuoka Inst. of Science and Tech.) |
| Secretary | Suehiro Shimauchi(NHK) / Shigeto Takeoka(Univ. of Tokyo) |
| Assistant | Keisuke Imoto(Ritsumeikan Univ.) / Daisuke Morikawa(Toyama Pref Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Engineering Acoustics |
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| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Performance evaluation of a non-linear beamformer with a small-scale microphone array |
| Sub Title (in English) | |
| Keyword(1) | Noise reduction |
| Keyword(2) | Non-linear beamforming |
| Keyword(3) | MEMS microphone array |
| 1st Author's Name | Ryoutarou Oka |
| 1st Author's Affiliation | kyushyu institute of technology(KIT) |
| 2nd Author's Name | Mitunori Mizumachi |
| 2nd Author's Affiliation | kyushyu institute of technology(KIT) |
| Date | 2019-12-12 |
| Paper # | EA2019-72 |
| Volume (vol) | vol.119 |
| Number (no) | EA-334 |
| Page | pp.pp.45-50(EA), |
| #Pages | 6 |
| Date of Issue | 2019-12-05 (EA) |