Figure 7. Surface pressure of 4 chambers muffle a) with MPP wall and without MPP wall at 3500 Hz, M=0, T=800˚K. The highest pressure represented by red color, while the blue represents the low pressure

From

Numerical Assessment and Shape Optimization of Dissipative Muffler and Its Effect on I.C. Engine Acoustic Performance

Sabry Allam

American Journal of Vehicle Design. 2014, 2(1), 22-31