A theoretical treatment of sound transmission through the walls of non-circular muffler shell is done for plane mode transmission within the muffler shell. Non-circular muffler shells include distorted circular (due to the welding seam), elliptical (oval) and flat-oval shells. An analytical formulation has been developed in this thesis in order to predict the breakout noise with the acoustical and structural wave coupling phenomena. First, progressive wave model is chosen. Then, the Transverse Transmission Loss (TTL) is predicted at different frequencies of interest. This formulation is extended to the standing wave model by which results for anechoic, rigid end and open end boundary conditions are obtained.
SH Gowtham Gudimella completed his B.Tech in Mechanical Engineering from Visvevaraya National Institute of Technology (NIT), Nagpur) in 2006 and has brief stint in Tata Consultancy Services (TCS) as Assistant Systems Engineer Trainee for about a year. He did his post graduation (2007-2009) in Mechanical Engineering from Indian Institute of Science (IISc), Bangalore with “Acoustics” as his research field. He has worked for a year after PG in Heat Exchangers Technology Division of BHEL-Hyderabad.