Sound Radiation from the Perforated End of a Lined Duct


TİRYAKİOĞLU B.

ACTA ACUSTICA UNITED WITH ACUSTICA, vol.105, no.4, pp.591-599, 2019 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 105 Issue: 4
  • Publication Date: 2019
  • Doi Number: 10.3813/aaa.919340
  • Title of Journal : ACTA ACUSTICA UNITED WITH ACUSTICA
  • Page Numbers: pp.591-599

Abstract

Radiation of sound wave through a lined duct with perforated end is analyzed rigorously. The problem considered is axisymmetric. By using the Fourier transform technique in conjunction with the Mode Matching method, the related boundary value problem is formulated as a Wiener-Hopf (W-H) equation. The Mode-Matching technique allows us to express the field component defined in the waveguide region in terms of normal modes. The solution involves a set of infinitely many expansion coefficients satisfying an infinite system of linear algebraic equations. The numerical solution of this system is obtained for different parameters of the problem such as the surface impedances, specific impedance of the perforated screen and their effects on the radiation phenomenon are shown graphically.