Reactive silencers are generally used to reduce low frequency noise which are very common in low speed equipments such as, low speed diesel engine, vacuum pump and sometimes twin lobe blowers. In reactive silencers no absorptive material is used. The low frequency noise is nullified by reaction by the process gas inside the silencer. These are generally resonated type or multi-chamber construction or a combination of both. The general limitations of reactive types is reasonably high pressure drop across the silencer and its unpredictable performance for high frequency noise reduction. We also offer a combination of reactive and absorptive silencers depending on the noise generated to achieve the desired noise level performance