A course on...

Acoustic Design of Mufflers


Location: Creta Maris Conference Center

Date | Time: Sunday, May 27,  2018 |  09:00 - 16:30


Prof. Mats Åbom, The Marcus Wallenberg Laboratory, The Royal Institute of Technology (KTH), Stockholm.

Prof. Tamer Elnady, Group for Advanced Research in Dynamic Systems, Ain Shams University, Cairo.

Acoustic Design of mufflers is often required for diagnosis, design validation and quality control.  Typically, design engineers require some basic theory, familiarization with the suitable terminology, and choice of instrumentation and testing configuration.

Course Objectives

  • Give an overview of the underlying theory of acoustic simulations of mufflers
  • Give an insight into muffler design principles
  • Give an insight into experimental methods
  • Demonstrate the use of software for acoustic two-port analysis (both low and high frequency)
  • Calculation of the pressure drop of muffler systems using two-ports

The Course

This course provides a brief overview of the low frequency behavior of mufflers including a description of the two-port theory. The course covers both the simulation of muffler system acoustics as well as the measurement of muffler 2-port data using the two-source location technique. The main focus is on exhaust mufflers for IC-engines but most of the information given is applicable to any pipe or duct system. In addition, the course will introduce 3D FEM analysis coupled to two-port modeling to extend the frequency range for larger mufflers. Two-port models can also be used to analyze duct networks in the high frequency range based on acoustic power flow; e.g. HVAC ducts. This is also treated in the course together with two-port models for analyzing pressure drop in duct systems.

The course comprises lectures and hands-on software examples where all attendants will have the opportunity to actively participate in both the measurements and simulations.

Who Should Attend

Engineers, students and technical managers seeking a grounding in the principles of muffler design and an introduction to the use of muffler and silencer design software are ideal attendees. Companies that design, purchase, or manufacture muffler or silencer systems will benefit. A knowledge of basic acoustics will be assumed. Mathematics to engineering degree level is desirable but not essential.

Course fee

The fee for the course including the course material, lunch and refreshments is 150 €


08:30 – 09:00


09:00 – 12:00

Welcome and Practical Details

Overview of noise in pipes and ducts applications

Aeroacoustics and Sound in ducts

Muffler Basics

12:00 – 13:00


13:00 – 16:30

Modeling duct networks in 1D

SIDLAB Demo, Simple Tutorials

Experimental Methods in Duct Acoustics

Effect of Flow in duct systems

Systematic Optimization

Modeling of high frequency

Course Summary / Questions & Answers

To register for this course use the Satellite Event Registration Form

For more info please contact Tamer Elnady, This email address is being protected from spambots. You need JavaScript enabled to view it.