Shielding Effectiveness of Meltblown Non-Woven Thin Fabric type Noise Suppressor

摘要

A new noise suppressor made by meltblown technique has been developed and studied by measurements and electromagnetic simulation. The shielding effectiveness for plane wave can be calculated using the sheet resistance by regarding the non-woven fabrics as a continuous metal sheet. The model of the only thin fibers have been constructed in order to clarify the noise suppression mechanism of high noise suppression performance of thin fibers. The direction of input electric field has been changed to discuss the conductive condition between fibers. As a result, the shielding effectiveness increases with the fiber layer increase and the conductivity of surface element of fibers increase, respectively.