研究者業績

中山 雅人

ナカヤマ マサト  (Masato Nakayama)

基本情報

所属
大阪産業大学 デザイン工学部情報システム学科 教授 (副学長)
(兼任)工学研究科 博士前期課程 専攻担当教員
学位
学士(工学)(近畿大学)
修士(工学)(和歌山大学)
博士(工学)(立命館大学)

研究者番号
90511056
J-GLOBAL ID
201601002814105918
researchmap会員ID
7000017209

外部リンク

論文

 125
  • Yuting Geng, Makoto Shimokata, Masato Nakayama, Takanobu Nishiura
    Applied Sciences 14(12) 5241-5241 2024年6月17日  
    With the development of acoustic simulation methods in recent decades, it has become feasible to simulate the sound pressure distribution of loudspeakers before actually setting physical speakers and measuring the sound field. The parametric array loudspeaker (PAL) has attracted attention due to its sharp directivity and unique applications. However, the sound reproduced by PALs is generated by the nonlinear interactions of ultrasound in the air, which makes it difficult to simulate the reproduced sound of a PAL with low computational load. Focusing on the sharp directivity of ultrasound, we extended conventional acoustic ray-tracing methods to consider the self-demodulation phenomenon of PALs. In this study, we developed a visualization method for the demodulated sound of a PAL. Specifically, the demodulated sound pressure distribution can be simulated to estimate and visualize the area covered by the reproduced sound of PAL before setting a real PAL. In the proposed method, acoustic rays were generated sequentially to express the generation of demodulated sound. Therefore, the proposed method is expected to simulate the demodulated sound of a PAL with acceptable accuracy and low calculation complexity. Quantitative evaluation between simulation results and practical measurement has been carried out, and the results demonstrate the effectiveness of the proposed method.
  • Yuting Geng, Masato Nakayama, Takanobu Nishiura
    2023 Asia Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC) 2023年10月31日  査読有り
  • Takuya Hayashi, Asuto Ueda, Toru Takahashi, Masato Nakayama
    2023 IEEE 12th Global Conference on Consumer Electronics (GCCE) 2023年10月  査読有り最終著者責任著者
  • Toru Takahashi, Kotaro Fukuda, Tomoru Awatani, Masato Nakayama
    2023 IEEE 12th Global Conference on Consumer Electronics (GCCE) 2023年10月  査読有り最終著者
  • Yuting Geng, Shiori Sayama, Masato Nakayama, Takanobu Nishiura
    APSIPA Transactions on Signal and Information Processing 2023年  査読有り

MISC

 192

講演・口頭発表等

 504

担当経験のある科目(授業)

 17

共同研究・競争的資金等の研究課題

 11

産業財産権

 10

研究テーマ

 3
  • 研究テーマ
    マイクロホンアレー,雑音下音声受音,音声認識
    研究期間(開始)
    2003/04/01
  • 研究テーマ
    能動騒音制御,快音化
    研究期間(開始)
    2007/04/01
  • 研究テーマ
    パラメトリックスピーカ,音場再現,立体音響,音レーダ
    研究期間(開始)
    2009/04/01