Updated on 2026/05/10

写真a

 
TOYOKA Shota
 
Organization
Faculty of Engineering Science Assistant Professor
Title
Assistant Professor

Research Interests

  • アクティブノイズコントロール; 音響信号処理

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering

  • Informatics / Perceptual information processing

Education

  • Kansai University   Graduate School of Science and Engineering

    2024.4 - 2026.3

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    Notes： Doctoral course

  • Kansai University   Graduate School of Science and Engineering   Engineering Science Major

    2022.4 - 2024.3

  • Kansai University   Faculty of Engineering Science   Department of Electrical and Electronic Engineering

    2018.4 - 2022.3

Research History

  • Kansai University   Faculty of Engineering Science Department of Electrical and Electronic Engineering   Assistant Professor

    2026.4

Professional Memberships

  • IEEE(The Institute of Electrical and Electronics Engineers, Inc.)

  • 騒音制御工学会

  • 電子情報通信学会

  • 日本音響学会

Papers

  • Selective Fixed-filter Active Noise Control with Compensation Filter Based on Modified Error Filtered-x Discrete Cosine Transform Least Mean Square Algorithm Reviewed

    TOYOOKA Shota, DOI Kenya, KITA Shunsuke, IWAI Kenta, KAJIKAWA Yoshinobu

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   E109.A ( 2 )   85 - 93   2026.2

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    Language：English   Publisher：The Institute of Electronics, Information and Communication Engineers  

    This paper presents a selective fixed-filter active noise control (ANC) system incorporating a compensation filter, based on a modified error filtered-x discrete cosine transform least mean square (Fx-DCT-LMS) algorithm. In the proposed framework, a compensation filter is cascaded with a fixed noise control filter, which is selected using a convolutional neural network (CNN). Adaptive signal processing is then applied to compensate for the discrepancy between the fixed filter and the optimal solution. The sliding discrete cosine transform (SDCT) enables filter selection using spectrograms generated from arbitrary-length sample windows, which serve as input to the CNN. Notably, since the proposed method utilizes the DCT to compute the spectrogram, it significantly reduces computational complexity compared to conventional DFT-based spectrogram generation. Moreover, by employing the DCT-LMS algorithm, the compensation filter achieves faster convergence than the conventional filtered-x normalized LMS (Fx-NLMS) algorithm. Simulation results using real-world impulse responses demonstrate that the proposed system can achieve up to 10 dB of noise reduction under varying noise conditions.

    DOI： 10.1587/transfun.2025eap1076

  • Hybrid active noise control system for remote microphone based virtual sensing with two compensation filters Reviewed

    Shota Toyooka, Yoshinobu Kajikawa

    APPLIED ACOUSTICS   241   2026.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.apacoust.2025.111039

    Web of Science

  • Active Noise Control System without Error Microphone Introducing Primary Path Estimation Reviewed

    MATSUURA Ryo, TOYOOKA Shota, IWAI Kenta, KAJIKAWA Yoshinobu

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   E109.A ( 1 )   58 - 62   2026.1

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    Language：English   Publisher：The Institute of Electronics, Information and Communication Engineers  

    This letter proposes an ANC system without an error microphone introducing primary path estimation. The proposed system enables adaptively update of a noise control filter to realize the noise reduction at a desired position without placing an error microphone at the target point, by estimating the primary path to the desired position. A computer simulation using impulse responses generated by the image method demonstrates that the proposed system achieves a noise reduction of more than 10 dB at the desired position, even when the noise source moves.

    DOI： 10.1587/transfun.2025eal2005

  • Stable Virtual Sensing Algorithm for Active Noise Control with Sequential Online Modeling of the Auxiliary Filter and the Secondary Path Reviewed

    TOYOOKA Shota, KAJIKAWA Yoshinobu

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   E109.A ( 1 )   1 - 12   2026.1

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    Language：English   Publisher：The Institute of Electronics, Information and Communication Engineers  

    This paper proposes stable virtual sensing algorithm for active noise control with sequential online modeling of the auxiliary filter and the secondary path. The two online modelings prevents system divergence and maintain high noise reduction when there is a secondary path change such as microphone relocation. The online modeling of the secondary path adjusts mismatch in the noise-control filter. The online modeling of the auxiliary filter compensates for the mismatch therein caused by the secondary path change. A simulation result with recorded signals shows that the proposed method maintains a noise reduction of 22 dB even when a secondary-path change takes place.

    DOI： 10.1587/transfun.2025eap1010

  • A novel hybrid active noise control with auxiliary filter-based virtual sensing for mixed unwanted noise reduction Reviewed

    Issei Tsuji, Shota Toyooka, Yoshinobu Kajikawa

    APPLIED ACOUSTICS   239   2025.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.apacoust.2025.110808

    Web of Science

  • Filter selection algorithm of virtual sensing for feedback active noise control system tracking noise variations Reviewed

    Toyooka Shota, Iwai Kenta, Kajikawa Yoshinobu

    Acoustical Science and Technology   46 ( 3 )   218 - 226   2025.5

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    Language：English   Publisher：ACOUSTICAL SOCIETY OF JAPAN  

    This paper proposes a filter selection algorithm of virtual sensing for feedback active noise control system tracking noise variations. The proposed system maintains noise reduction performance by switching to an optimal noise control filter according to variations in noise characteristics. Noise variations are detected using bandpass filters with different frequency responses, and the optimal noise control filter is selected based on these detections. The auxiliary filter in virtual sensing is then re-estimated to track the variation in the noise control filter. Simulation results with actual impulse responses show that the proposed system can maintain a noise reduction of approximately 10 dB even when the noise varies.

    DOI： 10.1250/ast.e24.103

    CiNii Books

    Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I034184844

  • Active Noise Control Systems with Sound Source Localization Robust to Noise Source Movement Reviewed

    TOYOOKA Shota, KAJIKAWA Yoshinobu

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   E108.A ( 2 )   160 - 164   2025.2

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    Language：English   Publisher：The Institute of Electronics, Information and Communication Engineers  

    This letter proposes a method that can track the movement of noise sources in fixed filter ANC and virtual sensing ANC systems by using source localization with multiple microphones. Since the optimal noise control filter depends on the location of the noise source, the proposed system prepares optimal noise control filters in advance for multiple locations where the noise is expected to move. The noise source location is then identified using the noise source localization method during the operation of the ANC system, and the appropriate noise control filter is selected according to the location. Simulation results using actual impulse responses show that a noise reduction of approximately 20 dB is possible even if the noise source moves.

    DOI： 10.1587/transfun.2024eal2007

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MISC

  • 指向性マイクロホンを用いたマルチチャネルデュアルANCシステムに関する検討

    仙藤拓馬, 豊岡祥太, 岩居健太, 梶川嘉延

    電子報通信学会技術研究報告   2026.3

  • 携帯型パラメトリックスピーカにおけるDAIF法に基づいたクロストークキャンセルに関する検討

    谷ノ口陽向, 豊岡祥太, 岩居健太, 梶川嘉延

    電子報通信学会技術研究報告   2026.3

  • チャネル相関除去を導入したオンライン二次経路モデリングを用いたマルチチャネルANCシステムに関する検討

    辻脇楓馬, 豊岡祥太, 梶川嘉延

    電子報通信学会技術研究報告   2026.3

  • バランスドアーマチュア型電気音響変換器における等価回路パラメータ推定に関する検討

    梅宮悠輔, 豊岡祥太, 喜多俊輔, 梶川嘉延

    電子報通信学会技術研究報告   2026.3

  • 最適化技術を用いたパラメトリックスピーカにおけるサイドローブの抑制に関する検討

    中川⻯, 豊岡祥太, 岩居健太, 梶川嘉延

    電子報通信学会技術研究報告   2026.3

  • 組み合わせ最適化に基づく HRTF の個人化手法の検討

    角野真弓, 豊岡祥太, 梶川嘉延

    日本音響学会2026春期研究発表会   2026

  • A Study on an ANC System Using the Frequency-Domain Simultaneous Perturbation Method with Variable Perturbation and Variable Step-Size Parameters under Disturbance Environments

    辻脇楓馬, 豊岡祥太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   125 ( 332(IT2025 36-78) )   2026

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  • 最適化技術を⽤いたパラメトリックスピーカーにおける指向特性の改善に関する検討

    中川⻯, 豊岡祥太, 岩居健太, 梶川嘉延

    第40回信号処理シンポジウム   2025.11

  • 周波数領域同時摂動法を⽤いた ANC システムにおけるコスト関数と摂動加法の解析

    辻脇楓馬, 豊岡祥太, 梶川嘉延

    第40回信号処理シンポジウム   2025.11

  • 携帯型パラメトリックスピーカにおけるクロストークに関する検討

    谷ノ口陽向, 豊岡祥太, 岩居健太, 梶川嘉延

    第40回信号処理シンポジウム   2025.11

  • Study on Multichannelization of Dual Active Noise Control Systems.

    仙藤拓馬, 豊岡祥太, 岩居健太, 梶川嘉延

    日本音響学会研究発表会講演論文集(CD-ROM)   2025   2025

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  • Study on Hybrid Compensation Selective Fixed-Filter Active Noise Control Using One-Dimensional CNN

    塚原大樹, 豊岡祥太, 岩居健太, 喜多俊輔, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   124 ( 389(EA2024 77-158) )   2025

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  • Study on Acoustic Analysis of Microspeakers Based on Electromagnetic-Structural-Acoustic Coupling

    山口翔, 豊岡祥太, 岩居健太, 喜多俊輔, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   124 ( 389(EA2024 77-158) )   2025

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  • Performance Evaluation of Active Noise Control System without Error Microphone Introducing Primary Path Estimation under Moving Noise Source Position.

    松浦亮, 豊岡祥太, 岩居健太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   124 ( 389(EA2024 77-158) )   2025

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  • Study on Coherence Selective ANC System Using Sliding DFT with Multiple Reference Microphones

    山下竣, 豊岡祥太, 岩居健太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   125 ( 141(EA2025 24-33) )   2025

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  • Study on Hybrid Active noise control System Based on Remote Microphone Method with Two Compensation Filters.

    豊岡祥太, 梶川嘉延

    日本音響学会研究発表会講演論文集(CD-ROM)   2025   2025

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  • Expanding the ANC control bandwidth for open-ear headphones using coaxial offset 2-way unit.

    千葉大将, 豊岡祥太, 鎌土記良, 加古達也, 伊藤弘章, 野口賢一

    日本音響学会研究発表会講演論文集(CD-ROM)   2025   2025

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  • Study on Optimal Online Modeling of the Feedback and Secondary Paths in ANC Systems.

    辻脇楓馬, 豊岡祥太, 岩居健太, 梶川嘉延

    日本音響学会研究発表会講演論文集(CD-ROM)   2025   2025

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  • 複数のマイクロホンを用いた音響耳認証に関する検討

    東浦光祐, 豊岡祥太, 喜多俊輔, 梶川嘉延

    第14 回バイオメトリクスと認識・認証シンポジウム (SBRA2024)   2024.12

  • ⼀次経路推定を導⼊した誤差マイクロホンを⽤いない ANC システムの予備的検討

    松浦亮, 豊岡祥太, 岩居健太, 梶川嘉延

    第39回信号処理シンポジウム   2024.12

  • 音響耳認証における適切な音源選定に関する検討

    山口正一郎, 豊岡祥太, 喜多俊輔, 梶川嘉延

    第14 回バイオメトリクスと認識・認証シンポジウム (SBRA2024)   2024.12

  • 半球型音響耳認証装置を用いた個人認証に関する検討

    古川健渡, 豊岡祥太, 喜多俊輔, 梶川嘉延

    第14 回バイオメトリクスと認識・認証シンポジウム (SBRA2024)   2024.12

  • Improvement of Noise Reduction Effect by Implementing Hybrid Compensation Selective Fixed-Filter Active Noise Control

    塚原大樹, 豊岡祥太, 岩居健太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   124 ( 318(EA2024 64-76) )   2024

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  • Study on Virtual Sensing in Feedback ANC Systems Considering Noise Changes.

    豊岡祥太, 梶川嘉延

    日本音響学会研究発表会講演論文集(CD-ROM)   2024   2024

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  • Study on Virtual Sensing Feedback ANC System with Noise Control Filter Selection

    豊岡祥太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   123 ( 401(EA2023 61-133) )   2024

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  • A Study on Virtual Sensing Active Noise Control System in Low Coherence Environment

    豊岡祥太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   124 ( 94(EA2024 10-30) )   2024

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  • A Study on Selective Fixed Filter Sub-band Active Noise Control System with Power Estimation.

    松浦亮, 豊岡祥太, 岩居健太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   124 ( 94(EA2024 10-30) )   2024

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  • フィードバックANCシステムにおけるマイクロホン間制約なしの補助フィルタ法に関する検討

    豊岡祥太, 梶川嘉延

    第38回信号処理シンポジウム   2023.12

  • Study on Zone of Quiet for Virtual Sensing Methods in ANC Systems

    豊岡祥太, 梶川嘉延

    電子情報通信学会大会講演論文集(CD-ROM)   2023   2023

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  • A Study on Virtual Sensing Method for Hybrid Active Noise Control System

    豊岡祥太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   122 ( 387(EA2022 75-127) )   2023

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  • Improvement of online modeling for virtual sensing method in ANC systems.

    豊岡祥太, 梶川嘉延

    日本音響学会研究発表会講演論文集(CD-ROM)   2023   2023

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  • A study on performance improvement of RMVS ANC system with coherence adjustment filter.

    TIANYU Xie, 豊岡祥太, 梶川嘉延

    日本音響学会研究発表会講演論文集(CD-ROM)   2023   2023

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  • Study on ANC System Considering Noise Source Movement in 2-D Space

    豊岡祥太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   123 ( 95(EA2023 4-17) )   2023

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  • Study on ANC System Considering Noise Source Movement in 3-D Space.

    豊岡祥太, 梶川嘉延

    日本音響学会研究発表会講演論文集(CD-ROM)   2023   2023

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  • ANCシステムにおけるオンラインモデリングを用いたバーチャルセンシング技術に関する性能向上の検討

    豊岡祥太, 梶川嘉延

    第37回信号処理シンポジウム   2022.12

  • A Study on Virtual Sensing Methods in ANC System.

    豊岡祥太, 梶川嘉延

    日本音響学会研究発表会講演論文集(CD-ROM)   2022   2022

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  • Comparison of Noise Reduction and Robustness for Virtual Sensing Methods in ANC Systems

    豊岡祥太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   121 ( 383(EA2021 64-97) )   2022

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  • A Study on Virtual Sensing Methods with Online Modeling in ANC System.

    豊岡祥太, 梶川嘉延

    日本音響学会研究発表会講演論文集(CD-ROM)   2022   2022

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  • A Study on Auxiliary Filter based Virtual Sensing in ANC Systems with online modeling

    豊岡祥太, 梶川嘉延

    電子情報通信学会技術研究報告(Web)   122 ( 165(SIP2022 50-79) )   2022

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Presentations

  • A Novel Hybrid Active Noise Control System with Remote Microphone based Virtual Sensing Algorithm

    S. Toyooka, Y. Kajikawa

    Asia Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)  2025.10 

  • Study on Optimal Online Modeling of the Feedback and Secondary Paths in ANC Systems

    F. Tsujiwaki, S. Toyooka, K. Iwai, Y. Kajikawa

    Asia Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)  2025.10 

  • Selective fixed filter sub-band active noise control system based on reference signal power estimation

    S. Toyooka, R. Matsuura, K. Iwai, Y. Kajikawa

    Asia Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)  2025.10 

  • A Study on Parameter Estimation of Equivalent Circuit for Balanced Armature Transducer

    Y. Umemiya, S. Toyooka, S. Kita, Y. Kajikawa

    2025 IEEE 14th Global Conference on Consumer Electronics  2025.9 

  • Improvement of the computational load of nonlinear ANC systems using Volterra filters

    S. Toyooka, N. Kamado, H. Itou, H. Chiba, S. Kozuka, Y. Kajikawa

    InterNoise 2025  2025.8 

  • Performance evaluation and feasibility of road noise control in commercial vehicles

    S. Toyooka, Y. Kajikawa, C.-R. Huang, C.-Y. Chang

    The 31st International Congress on Sound and Vibration  2025.7 

  • Optimal selection of reference microphone for active noise control

    S. Toyooka, Y. Kajikawa

    Inter-Noise 2024  2024.8 

  • Performance Improvement of Remote Microphone-Based Virtual Sensing Method for Feed-forward Active Noise Control System with Coherence-Adjusting Filter

    T. Xie, S. Toyooka, K. Iwai, Y. Kajikawa

    Smart Info-Media Systems in Asia  2023.9 

  • Hybrid Active Noise Control with Auxiliary filter based Virtual Sensing

    S. Toyooka, Y. Kajikawa

    Inter-Noise 2023  2023.8 

  • An Online Identification Method for Virtual Sensing in ANC System

    S. Toyooka, Y. Kajikawa

    Acoustical Society of America - 183rd Meeting  2022.10 

  • A Study on Improving the Robustness of Virtual Sensing Methods in ANC System

    S. Toyooka, Y. Kajikawa

    Inter-Noise2022  2022.8 

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Awards

  • 第２７回学生優秀発表賞

    2024.3   日本音響学会  

  • 学術奨励賞

    2023.3   電子情報通信学会