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<p>The acoustic characteristics of one-dimensional generalized Thue-Morse quasi-periodic structures using serial closed resonators with varying cross-section areas are examined in this work. The localization and the acoustic band gap features are analysed by systematically altering the complexity of the generalized Thue-Morse sequences. The findings show that higher-order generalized Thue-Morse sequences introduce stronger localized modes and wider acoustic band gaps, which allow for control over wave propagation. We demonstrated the role of using resonators with different cross-section areas to enhance wave confinement and band gap tunability. Results show the potential use of the proposed generalized Thue-Morse structures in high-sensitivity sensors, multi-frequency resonators, and tunable filters, among other advanced acoustic applications.</p>

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Properties of localized modes and acoustic band gaps using serial closed resonators in generalized Thue Morse quasi periodic sequences

  • 期刊论文

  • 发表日期：

    2025年4月20日

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  • Zaky A. Zaky,
  • Mohamed El Malki,
  • Ali Alzahrani,
  • Ilyas Antraoui,
  • Ali Khettabi,
  • Mohammed Sallah

摘要

The acoustic characteristics of one-dimensional generalized Thue-Morse quasi-periodic structures using serial closed resonators with varying cross-section areas are examined in this work. The localization and the acoustic band gap features are analysed by systematically altering the complexity of the generalized Thue-Morse sequences. The findings show that higher-order generalized Thue-Morse sequences introduce stronger localized modes and wider acoustic band gaps, which allow for control over wave propagation. We demonstrated the role of using resonators with different cross-section areas to enhance wave confinement and band gap tunability. Results show the potential use of the proposed generalized Thue-Morse structures in high-sensitivity sensors, multi-frequency resonators, and tunable filters, among other advanced acoustic applications.