Acoustic floor mat
An acoustic floor mat is provided with a base layer, an upper surface, a lower surface, and a plurality of apertures configured to allow passage of acoustic transmissions therethrough. The base layer is further configured to provide a substantial barrier to the passage of liquid from the upper surface to the lower surface. Methods of making an acoustic floor mat are also disclosed.
1. An acoustic floor mat comprising:
a) a base layer including upper surface, a lower surface, a plurality of protrusions defined in the upper surface and a plurality of nibs extending from the lower surface configured to reduce movement of the floor mat about a vehicle floor, wherein the thickness of the base layer is reduced at an upper portion of at least one protrusion, wherein the base layer further includes a plurality of apertures positioned to allow passage of acoustic transmissions therethrough, and wherein said base layer apertures are located within the protrusions and only extend from said lower surface of said base layer through said upper surface of said base layer;
b) a face layer comprising a carpet mounted adjacent the upper surface of the base layer; and
c) a padding layer positioned between the base layer and the face layer, at least one surface of the padding layer having the shape of the respective protrusions.
2. The acoustic floor mat of claim 1 , wherein the padding layer comprises fibrous material.
3. The acoustic floor mat of claim 1 , wherein each protrusion has an upper and lower surface and the lower surface of each protrusion defines an open-ended cavity, wherein each cavity is provided with at least one of the apertures for communication between the cavity and the upper surface of the base layer.
4. The acoustic floor mat of claim 3 , wherein a plurality of the open-ended cavities comprise a pyramid shaped cavity with an apex spaced from the upper and lower surfaces.
5. The acoustic floor mat of claim 4 , wherein at least one of the pyramid shaped cavities is provided with an aperture extending from near the apex of the cavity to the upper surface of the base layer.
6. The acoustic floor mat of claim 4 , wherein the thickness of the base layer is minimized near an apex of at least one of the cavities.
7. The acoustic floor mat of claim 6 , wherein at least one of the plurality of aperture comprises a pin hole.
8. The acoustic floor mat of claim 1 , wherein the base layer includes a material comprising a plurality of closed-cell interstitial voids.