The two main types of Sonata Exhaust Silencers used on internal combustion engines are reactive and absorptive chambered silencers. Sound Controls’ standard Sonata Muffler designs are intended for use on dry engine exhaust systems. Standard Silencers are available to meet critical, residential, industrial, or your specific acoustic performance needs. Once the noise attenuation requirements are established, the silencer selection should include the following requirements: minimum backpressure, physical size to space available, inlet and outlet connections.