The rectangular muffler is widely used in the ventilating duct system. With a simple structure, low cost, good sound reduction effect and low loss of pressure, the rectangular muffler is the preferred one used in the ventilating duct system. Moreover, since the rectangular muffler is comparatively simple, a group or multiple groups of mufflers can be selected and installed according to the size of the ventilating duct so as to achieve the required effect.
The rectangular muffler is characterized as follows:
Single-body design has an excellent aerodynamic performance.
Hollow sound absorption design increases the sound absorption perimeter, lowers the adverse acoustic impact from the round section, enlarges the circulation area, move s the high-frequency interception frequency upwards, and optimizes the sound absorption bandwidth.
Small-mass division combination of sound absorption body: it further enlarges the sound absorption area and circulation area, makes the air flow distribute more even, facilitates the mass production and minimizes cost.
The combination design allows to adjust and install the muffler along the width and the height directions so as to match with different cross sections of the air duct; it solves not only the difficulty of the traditional slice-type muffler matched with the air duct of civil building, but also overcomes the difficulty of installation resulted from discrepancy between the actual dimension and the drawing dimension of civil structure; moreover it facilitates transportation, installation and assures of the installation quality.