| Presentation | 2018-03-20 [Poster Presentation] Optimization of Outdoor Loudspeaker Level Based on U50 for Disaster Prevention Administrative Radio Ryouichi Nishimura, Shuichi Sakamoto, Yoshifumi Chisaki, Zhenglie Cui, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Announcement through outdoor loudspeakers of disaster prevention administrative radio is important not only for early warning but also as the final channel to convey information to evacuating people when the public wireless network is down due to earthquake or flood of access request. Loudspeakers are placed at scattered points in order to cover a wide area but it causes a so-called long-path echo problem by which speech becomes difficult to catch because a single speech arrives multiple times with different delays. An attempt to solve this problem was to controll the speed of utterance appropriately. Another is to adjust the length of silent portions. These research works focused on the temporal aspect of speech. In contrast, we try to ease the problem by adjusting output levels of loudspeakers, employing U50. It was proposed as an index of speech intelligibility in a reverberant environment and defined as a ratio of the energy of early and late sound components. In the long-path echo problem, the early sound is not always the primary component for understanding the speech. Therefore, we newly proposed probabilistic U50 and conducted global optimization with respect to it. As a result, improvement by 6.5 dB was achieved, compared with the case where the speech is presented at the equal level at all loudspeakers. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Disaster prevention administrative radio / Outdoor loudspeaker / Probabilistic U50 / EM algorithm / Speech intelligibility |
| Paper # | EA2017-146,SIP2017-155,SP2017-129 |
| Date of Issue | 2018-03-12 (EA, SIP, SP) |
| Conference Information | |
| Committee | SIP / EA / SP / MI |
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| Conference Date | 2018/3/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Speech, Engineering/Electro Acoustics, Signal Processing, and Related Topics [SIP, EA, SP]/ Medical Image Engineering, Analysis, Recognition, etc. [MI] |
| Chair | Masahiro Okuda(Univ. of Kitakyushu) / Suehiro Shimauchi(NTT) / Yoichi Yamashita(Ritsumeikan Univ.) / Kensaku Mori(Nagoya Univ.) |
| Vice Chair | Shogo Muramatsu(Niigata Univ.) / Naoyuki Aikawa(TUS) / Mitsunori Mizumachi(Kyutech) / Hiroki Mori(Utsunomiya Univ.) / Yoshiki Kawata(Tokushima Univ.) / Yuichi Kimura(Kinki Univ.) |
| Secretary | Shogo Muramatsu(Chiba Inst. of Tech.) / Naoyuki Aikawa(Takushoku Univ.) / Mitsunori Mizumachi(Akita Pref. Univ.) / Hiroki Mori(Shizuoka Inst. of Science and Tech.) / Yoshiki Kawata(Shizuoka Univ.) / Yuichi Kimura(Meijo Univ.) |
| Assistant | Masayoshi Nakamoto(Hiroshima Univ.ひろ) / TREVINO Jorge(Tohoku Univ.) / Nobutaka Ito(NTT) / Kei Hashimoto(Nagoya Inst. of Tech.) / Satoshi Kobashikawa(NTT) / Ryo Haraguchi(Univ. of Hyogo) / Yasushi Hirano(Yamaguchi Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Signal Processing / Technical Committee on Engineering Acoustics / Technical Committee on Speech / Technical Committee on Medical Imaging |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Poster Presentation] Optimization of Outdoor Loudspeaker Level Based on U50 for Disaster Prevention Administrative Radio |
| Sub Title (in English) | |
| Keyword(1) | Disaster prevention administrative radio |
| Keyword(2) | Outdoor loudspeaker |
| Keyword(3) | Probabilistic U50 |
| Keyword(4) | EM algorithm |
| Keyword(5) | Speech intelligibility |
| 1st Author's Name | Ryouichi Nishimura |
| 1st Author's Affiliation | National Institute of Information and Communications Technology(NICT) |
| 2nd Author's Name | Shuichi Sakamoto |
| 2nd Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 3rd Author's Name | Yoshifumi Chisaki |
| 3rd Author's Affiliation | Chiba Institute of Technology(Chiba Inst. of Tech.) |
| 4th Author's Name | Zhenglie Cui |
| 4th Author's Affiliation | Tohoku University(Tohoku Univ.) |
| Date | 2018-03-20 |
| Paper # | EA2017-146,SIP2017-155,SP2017-129 |
| Volume (vol) | vol.117 |
| Number (no) | EA-515,SIP-516,SP-517 |
| Page | pp.pp.245-250(EA), pp.245-250(SIP), pp.245-250(SP), |
| #Pages | 6 |
| Date of Issue | 2018-03-12 (EA, SIP, SP) |