The sound-absorbing properties of two-component sound-absorbing cotton materials are related to the geometric structure parameters and physical parameters, such as the structure structure, gram weight (thickness), the tube depth of the specimen and the use environment.

Figure 1 is the microstructure diagram of two-component sound-absorbing cotton materials, such as fine cocoon and cotton, with a large number of gaps in the inner fluff and a relatively uniform distribution of gaps. These gaps intersect with each other in the inner material, and are open to the outside world, making it easy for sound waves to enter the gaps.

FIG. 1 structure of two-component sound-absorbing cotton in embossing forming (x 25)