Learn · Muffler Acoustics-Application to Automotive Exhaust Noise Control

Lecture 41 of 49Week 11

Transmission Loss in terms of Scattering and Impedance Matrix Parameters

Prof. Akhilesh Mimani · IIT Kanpur

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Muffler Acoustics-Application to Automotive Exhaust Noise Control, IIT Kanpur (at NPTEL)
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All the lectures

  1. Introduction to Acoustic Wave Propagation Video
  2. D'Alemberts's solution and 1-D Continuity equation Video
  3. Muffler Acoustics-Application to Automotive Exhaust Noise Control Video
  4. Linearization of governing equations, and Development of 1-D Acoustic wave & Helmholtz equation Video
  5. Solution of 1-D Helmholtz equation: Propagation in 1-D ducts/pipes Video
  6. 1-D Acoustic Wave Equation in Ducts Carrying Uniform Mean Flow: Derivation Video
  7. 1-D Acoustic Wave Equation in Ducts Carrying Uniform Mean Flow: Solution Video
  8. 3-D Acoustic Wave Equation in Rectangular and Circular Waveguides: Derivation, Modal Solution and Concept of Cut-on Frequency Video
  9. Sound Pressure Level, Intensity Level and Sound Power Level Video
  10. Acoustic Impedance and Reflection Coefficient Video
  11. Lumped System Analysis: Inertance and Compliance Video
  12. Lumped Analysis of a Uniform Pipe Closed/Open at an End, Concept of End Correction Video
  13. Helmholtz Resonator, Electro-Acoustic Analogy and Layout of a typical engine exhaust system Video
  14. Week 4 Video
  15. Muffler Performance Measures: Transmission Loss & Level Difference Video
  16. v12CQq0dJq4 Video
  17. Sudden area Discontinuity (Continued) Video
  18. Simple Expansion Chamber Analysis Using Transfer Matrix Method Video
  19. Transmission Loss (TL) Graph for a Simple Expansion Muffler (MATLAB) Video
  20. Extended-Inlet and Extended-Outlet Muffler Analysis Video
  21. Extended-Inlet and Extended-Outlet Muffler Analysis (Continued) Video
  22. TL Analysis of Extended-Inlet and Extended-Outlet Muffler (MATLAB) Video
  23. TL Analysis of Side-Inlet and Side-Outlet Muffler Using Transfer Matrix Method Video
  24. Wave Propagation in Gradually Varying Area Ducts: Webster's Horn Equation Video
  25. Webster's Horn Equation (Contd.) and Exponential Ducts Video
  26. Solution of Webster's Horn Equation for Conical Ducts Video
  27. TL analysis for Conical Muffler Configurations (MATLAB) Video
  28. Segmentation Approach for Analysing Gradually Varying Area Ducts (MATLAB) Video
  29. Acoustic Intensity (Energy Flux) in a Pipe with Mean Flow, and Transmission Loss Expression Video
  30. Aeroacoustic State Variables Transfer Matrix for a Tubular Element (Uniform Pipe) Video
  31. Transfer Matrix for Extended-Inlet and Outlet Element & Use of Perforated Elements in Commercial Mufflers Video
  32. Two-interacting Duct Configurations: Development of Equations and Concentric Tube Resonators Video
  33. Concentric Tube Resonator: Partially Perforated Pipe or Airway (MATLAB) Video
  34. Review of Perforate Impedance Expressions Video
  35. MATLAB Demonstration for Fully and Partially Perforated CTR Video
  36. Cross-Flow elements: Setting-up the Equations Video
  37. Cross-Flow elements: MATLAB Demonstration for Simple Configurations Video
  38. Plug Mufflers, Three-pass Perforated Element Muffler (Commercial Configurations) - MATLAB Video
  39. Multiply-Connected Mufflers: HQ Tubes Video
  40. TL Analysis of HQ Tubes (MATLAB): Network Analysis and Analytical Formula Video
  41. Transmission Loss in terms of Scattering and Impedance Matrix Parameters Video
  42. Rectangular Chamber Muffler: Characterization and TL Analysis using 3-D Piston-driven Model Video
  43. Circular Chambers: Characterization and TL Analysis Using 3-D Piston-driven Model Video
  44. Analytical Mode-Matching for Extended-Inlet and Outlet Muffler: Setting-up of the Equations Video
  45. MATLAB Demonstration for Transmission Loss Calculations Video
  46. Dissipative Mufflers (Lined Circular duct) - A Brief Discussion Video
  47. Summary of the Topics Covered in This Course, Topics to be Covered in a Future Course Video
  48. Live Session 12-04-2021 Video
  49. Live Session 14-04-2021 Video