Multi-layer acoustic medium
Acoustic mediums are disclosed herein. The acoustic mediums can include a plurality of layers. The layers of the acoustic mediums can include fibrous acoustic materials that are entangled throughout the layer. In certain instances, the layers of the acoustic medium can include first portion of acoustic materials disposed along a first plane, and a second portion of acoustic materials disposed along a second plane. Methods of fabricating multi-layer acoustic mediums are also disclosed.
1 . An acoustic medium comprising:
a layer of fibrous acoustic material comprising a first portion and a second portion, wherein the first portion comprises fibers that are polar in the fibrous acoustic material of the acoustic medium such that the first portion is electrically oriented and entangled within the second portion, wherein the first portion of the fibrous acoustic material comprises between about 10% and about 40% of fibers in the fibrous acoustic material, wherein the fibers of the first portion are oriented along a first direction and the fibers of the second portion are oriented along a second direction that is not parallel with the first direction.
2 . The acoustic medium of claim 1 , wherein the fibrous acoustic material comprises at least one of cotton, rayon, acetate, nylon, wood, olefins, polyesters, acrylics, or fiberglass.
3 . The acoustic medium of claim 1 , wherein the fibrous acoustic material comprises polyester or fiberglass.
4 . The acoustic medium of claim 1 , wherein the fibrous acoustic material is nonwoven.
5 . The acoustic medium of claim 1 , wherein the fibrous acoustic material comprises at least one high melt material and at least one low melt material.
6 . The acoustic medium of claim 5 , wherein the fibrous acoustic material comprises between about 50% and about 95% of high melt material, and between about 5% and about 50% of low melt material.
7 . The acoustic medium of claim 1 , wherein the fibers of the first portion of the fibrous acoustic material of the acoustic medium include a first region and a second region having a different charge than the first region.
8 . The acoustic medium of claim 1 , wherein the first portion comprises a first average denier, and the second portion comprises a second average denier that is different than the first average denier.
9 . An acoustic medium comprising:
a layer of fibrous acoustic material comprising a first portion and a second portion, wherein the first portion is electrically oriented and entangled within the second portion, wherein the first portion comprises fibers that are polar in the fibrous acoustic material of the acoustic medium, wherein the fibers of the first portion are oriented along a first direction and the fibers of the second portion are oriented along a second direction that is different than the first direction, wherein the first portion comprises a first average denier and the second portion comprises a second average denier that is different than the first average denier.
10 . The acoustic medium of claim 9 , wherein the fibrous acoustic material comprises at least one of cotton, rayon, acetate, nylon, wood, olefins, polyesters, acrylics, or fiberglass.
11 . The acoustic medium of claim 9 , wherein the fibrous acoustic material comprises polyester or fiberglass.
12 . The acoustic medium of claim 9 , wherein the fibrous acoustic material is nonwoven.
13 . The acoustic medium of claim 9 , wherein the fibrous acoustic material comprises at least one high melt material and at least one low melt material.
14 . The acoustic medium of claim 9 , wherein the second portion is substantially unaffected by an electrical charge.
15 . The acoustic medium of claim 9 , wherein the first portion of the fibrous acoustic material comprises between about 10% and about 40% of fibers in the fibrous acoustic material.