Journal of Mechanical Science and Technology

, Volume 19, Issue 8, pp 1568–1575 | Cite as

Transmission loss estimation of three dimensional silencers with perforated internal structures using multi-domain BEM

  • Hyeon-Don Ju 
  • Shi-Bok Lee 


The calculation of the transmission loss of the silencers with complicated internal structures by the conventional BEM combined with the transfer matrix method is incorrect at best or impossible for 3-dimensional silencers due to its inherent plane wave assumption. On this consideration, we propose an efficient practical means to formulate algebraic overall condensed acoustic equations for the whole acoustic structure, where particle velocities on the domain interface boundaries are unknowns, and the solutions are used later to compute the overall transfer matrix elements, based on the multi-domain BEM data. The transmission loss estimation by the proposed method is tested by comparison with the experimental one on an air suction silencer with perforated internal structures installed in air compressors. The method shows its viability by presenting the reasonably consistent anticipation of the experimental result.

Key Words

Transmission Loss Overall Condensed Acoustic Equation Multi-domain BEM (Boundary Element Method) Air Suction Silencer 


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Copyright information

© The Korean Society of Mechanical Engineers (KSME) 2005

Authors and Affiliations

  1. 1.School of Fire & Disaster Prevention EngineeringJinju International UniversityChinjuKorea
  2. 2.School of Mechanical EngineeringPusan National UniversityPusanKorea

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