Rectangular Mesh Acoustic Fabric for Particle Blocking and Low Distortion

The patent applies asymmetry by using rectangular mesh openings instead of square mesh openings. The rectangular geometry provides different dimensions in the horizontal and vertical directions, allowing optimization of particle filtration in one direction while maintaining sound transmission in the other direction. This asymmetric structure resolves the contradiction by enabling simultaneous achievement of protection and acoustic transparency.

The rectangular mesh geometry creates asymmetric flow paths that reduce acoustic distortion. The different horizontal and vertical dimensions of the mesh openings allow sound waves to pass more smoothly while still blocking particles, thereby reducing the generation of harmonic distortion and flow noise compared to symmetric square mesh structures.

The rectangular mesh allows one dimension to be minimized for particle blocking while the other dimension remains larger to maintain open area for sound transmission. This asymmetric configuration enables stopping smaller particles through the reduced dimension while preserving adequate acoustic transparency through the larger dimension, thereby reducing acoustic insertion loss.

The rectangular mesh structure allows optimization of thread placement and diameter in different directions. By having different horizontal and vertical mesh dimensions, the design can accommodate thicker threads in one direction for particle blocking while maintaining larger open areas in the perpendicular direction to minimize airflow resistance and energy loss.