Fall 2013 VAC Meeting


November 6, 2013
Cummins Engine Plant

500 Central Ave. (Gate 96)

Columbus, IN  47201


Directions and Accommodations



8:00 a.m. Coffee and Pastries


8:15 a.m. Tutorial

·         Practical Aspects of Enclosure Design for Noise Control


9:00 a.m. Introductions


9:15 a.m. Morning Presentations

·         Metrics for Muffler Performance (Multi-Inlet Mufflers)

·         Introduction to Acoustic Meta-Materials

·         Transfer Matrix Models for Leaks and Seals

·         Tricks for Improving Muffler Performance without Increasing Size

·         Determining the Effect of Glue and/or Adhesives between Absorbing Material Layers

·         Time Domain Transfer Path Analysis using the PU-Probe

·         Using Simulation to Determine the Properties of Mounts


12:00 p.m. Lunch


·         Introduction to the Cummins Engine Product Line


1:00 p.m. Afternoon Presentations


·         Enhancing the Performance of MPP Absorbers

·         Muffler Transmission and Insertion Loss in Octave Bands

·         Full Frequency Duct Models in ESI VA-One

·         Frequency Based Substructuring Applied to Airborne Paths

·         Guest Presenter Dr. David Burd Simulation of Exhaust Line Noise Using FEM and TMM

·         Extending FE Models to Higher Frequencies using Scale Modeling

·         Modeling the Termination Impedance of Ducts using the Automatically Matched Layer

·         Measurement Study on the Effect of Louvers

·         Future Work


3:10 p.m. Tour of Cummins NVH Facilities (15 minute drive)


4:30 p.m. Adjourn


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