The noise of gasoline generator sets has the characteristics of broadband frequency spectrum, and the muffler equipment is required to resist high airflow velocity, high temperature and high pressure, and not afraid of water and humidity. When the temperature rises, the performance of the muffler does not change much. According to this In some cases, micro-perforated plate composite mufflers are mostly used in management.

The micro-perforated plate muffler with a double-layer structure with a diameter of 0.5-1mm and a perforation rate of 1%-3% is processed from a thin steel plate of 0.5-1mm, which has a good absorption effect on medium and high frequency noise.

When using multiple layers, the thickness of the cavity depends on the absorption frequency band. When the low frequency is 125 to 250 Hz, the thickness of the cavity is 150 to 220 mm, and when the intermediate frequency is 500 to 1000 Hz, the thickness of the cavity is 80 to 120 mm. When the high frequency is 2000-4000Hz, the cavity is 30-50mm. In order to prevent the propagation of sound waves along the pipe length in the cavity of the micro-perforated plate, a transverse baffle should be added every 0.5m for the muffler that needs a higher amount of noise reduction. . The section of the double-layer micro-perforated plate tubular muffler is circular.