A time domain computational approach is applied to predict the acoustic performance of multiple pass silencers with perforated tube sections. This non-linear, one-dimensional method may readily include temporal and spatial variations in sound pressure level, orifice flow velocities, and mean duct flow, all of which affect the local orifice behaviour of perforated tube elements, and therefore th...

The noise levels generated by an unmuffled engine exhaust system can be identified as the loudest vehicle source. muffler or silencer is essential component of internal combustion system. Its main function to reduce exhaust-generated acceptably low level. design development a complex process affecting efficiency and thus fuel consumption, emissions overall generation. This paper focuses on for ...

The primary objective of the study is to compare insertion loss in an expansion chamber muffler using white and pink noise. White noise has equal power per hertz over entire range frequencies, while decreases with increasing frequency. Nonetheless, as width successive octaves increases, renders octave. sound pressure level at output port recorded acoustic analyzer, maintaining a constant input ...