Improving the directionality of low-frequency acoustic radiation by a finite array of quadrupolar sources with acoustic metamaterials

HIGHLIGHTS

• who: Qinglei Zeng and colleagues from the Center of Advanced Microstructures, Nanjing University, Nanjing, China have published the article: Improving the Directionality of Low-Frequency Acoustic Radiation by a Finite Array of Quadrupolar Sources with Acoustic Metamaterials, in the Journal: Crystals 2023, 101 of /2023/
• what: The authors demonstrate that acoustic metamaterials arranged as an array of quadrupoles remarkably improve the directionality of acoustic radiation at low frequencies compared with previous metamaterials arranged as monopole and dipole structures. On this basis, the authors propose the structure for equivalent quadrupole radiation shown the structure designed by . . .
  

   

  

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