Abstract: Embodiments describe an eartip including an eartip body having an attachment end and an interfacing end opposite from the attachment end. The eartip body can include an inner eartip body having a sidewall extending between the interfacing end and the attachment end, the sidewall defining a channel and having a first thickness near the attachment end and a second thickness different from the first thickness at the interfacing end. The eartip can also include an attachment structure coupled to the inner eartip body at the attachment end, the attachment structure having an inner surface and an outer surface. The attachment structure can include an upper region interfacing with the sidewall and defining discrete through-holes, a lower region below the upper region where the inner surface defines a plurality of recesses positioned around the lower region, and a mesh extending across the channel and into the upper region.

Abstract: A method, apparatus, and system for winding a filament around a substrate includes mounting the substrate to a rotatable structure and rotating the substrate to wind the first filament around the substrate in a first winding orientation that winds the first filament around a first pair of edges of the substrate to wrap a first filament layer around the substrate. The method further includes changing winding orientations of the first filament from the first winding orientation to a second winding orientation by turning the first filament about a corner of the substrate and winding the first filament around the rotating substrate in the second winding orientation that winds the first filament around a second pair of edges of the substrate, wherein the second pair of edges is different from the first pair of edges, to wrap a second filament layer around the substrate.

Abstract: An assembly for testing a durability of a soft body armor system includes a top mounting assembly, a bottom mounting assembly, the soft body armor system being fixedly disposed between the top mounting assembly and the bottom mounting assembly, a rotary actuator coupled to the top mounting assembly, the rotary actuator configured to rotate the top mounting assembly in a range of approximately +90 degrees to and including ?90 degrees, a linear bearing on each end of the bottom mounting assembly, and a bearing rod on which each linear bearing is configured to ride. A rotation of the top mounting assembly induces torsional, axial and bending forces substantially simultaneously on the soft body armor system.