muffler
Detailed introduction:
Muffler is a kind of noise reduction device for airflow pipeline with noise transmission at the same time, such as pipeline and elbow with sound absorption lining or pipeline with sudden change of cross-section area and other discontinuous acoustic impedance, which can attenuate or reflect back the noise in pipeline. The former is called resistance muffler, the latter is called resistance muffler, and there are impedance composite mufflers.