A Review on Muffler with Resonator Configuration to Reduce Low Frequency Noise

High noise levels occur during exhaust noise from vehicle engines and impression of noise from surrounding. The sound waves strikes on the surface of the tube shaped fairing and couples with the methods of the system causing vibration. In this way the issue of noise inside the fairing has turned out to be much progressively essential. Nowadays, Resonators are used widely to reduce low frequency noise of engine exhaust. Resonator has unique characteristic of attenuate noise without any absorptive material, which make it highly useful for automobile, aerospace and some other industrial application. Newly designed resonator array have been utilized to acquire broad band transmission loss in the generally low frequency scope of exhaust system. The transmission loss qualities are controlled by the acoustics impedance attributes of the resonators. In the paper, review study has been done for comparison between the transmission losses of silencer of the engine using resonators with different configuration. In this study, suggestion is made on the basis of improved noise attenuation performance of the resonator at low frequency with limited space. Also comparative study of transmission characteristics has been done on the basis of acoustics impedance characteristics of resonators.