Microfracture plate muffler

The utility model belongs to the ventilation and silencing technology and relates to a microfracture plate muffler. A metal shell (1) is internally provided with a cylindrical microfracture plate shell (3), two ends of which are connected with the metal shell as a whole (1) by end plates (13), and a single-layer resonant cavity (2) is formed with the clearance of the metal shell (1); the shell of the cylindrical microfracture plate is internally provided with a single-layer microfracture plate resonant cavity muffler sheet (4) formed by two layers of flat type microfracture plates (11) and a middle partition plate (6); and two single-layer resonant cavities are formed by clearances between the two layers of flat type microfracture plates (11) and the middle partition plate (6). In the utility model, the muffling volume achieves 12dB(A)/m on average, which is improved by 42% compared with the muffling volume of a two-layer micropunch plate muffler; the resistance coefficient is 1.4 on average; the appearance d