Earticle

초록

영어

Research has been conducted on acoustic metamaterials that control the transmission characteristics of reflected and refracted waves using phase delay by resonators. Using one-dimensional theory, the phase delay equations for the 1/4 wavelength and Helmholtz resonator are presented. These one-dimensional analysis results are compared with the results predicted by three-dimensional FEM. The advantages and disadvantages of 1/4 wavelength and Helmholtz resonator were confirmed in implementing phase delay. An acoustic metamaterial with a refraction angle of 30° was manufactured using multiple tubes and then the sound pressure distribution was measured. A relatively large sound pressure was measured at the target position of 30°, which was compared with the 3D FEM analysis results. Simulations confirmed that a phase delay range closer to 2π was more effective in refraction, but varying the number of resonators was found to have minimal impact on which additional research is needed for generalization.

목차

ABSTRACT
1. 서론
2. 이론
2.1 일반화된 Snell의 법칙과 위상 지연
2.2 공명기를 이용한 위상 지연
2.2 공명기에 따른 위상 지연 특성
3. 결과
3.1 음파 굴절 특성 실험 결과
3.2 음파  굴절 특성 시뮬레이션 결과
4. 결론
References

키워드

저자

• 백성현 [ Seong-Hyeon Baek | Department of Mechanical Engineering, Jeonbuk National University ]
• 이일재 [ Il-Jae Lee | Department of Mechanical Engineering, Jeonbuk National University ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국기계항공기술학회지(구 한국기계기술학회지) [Journal of the Korean Society of Mechanical and Aviation Technology ]

• 간기

  격월간

• pISSN

  1229-604X

• eISSN

  2508-3805

• 수록기간

  1999~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 550 DDC 620