Abstract: Exhaust noise must meet legislation
targets, customer expectations and cost reduction
which call for design optimization of the exhaust
systems in the design phase. One solution is to
use 3 dimensional linear pressure acoustics and
calculate the transfer matrix of the muffler. The
transfer matrix is the basis for calculating either
the insertion loss or transmission loss of a
muffler. The 3D simulations in Comsol of
different muffler configurations are verified by
measurements in a flow acoustic test rig using
the two source method