Sound attenuation device

1. A sound attenuation device comprising:

a shell defining an interior space, the shell being insulated;

a first cutout positioned in a front of the shell, the first cutout being shaped substantially complementarily to an engine compartment of a leaf blower;

a second cutout extending from the front of the shell into a first side of the shell, the second cutout being shaped substantially complementarily to a cross-sectional profile of a pipe of the leaf blower wherein the first cutout is configured for inserting the engine compartment of the leaf blower into the interior space such that the pipe extends from the shell through the second cutout;

a coupler coupled to the shell proximate to the front, the coupler being configured for coupling the shell to the leaf blower such that the shell substantially encapsulates the engine compartment wherein the shell is configured for attenuating sound generated by an engine of the leaf blower;

the shell comprising at least one of polyurethane coated polyester, polyethylene, and plastic such that the shell is substantially impermeable to water, the shell being substantially rectangularly box shaped, the shell having a back comprising a first section and a second section, the first section extending perpendicularly from a bottom of the shell, the second section extending transversely from the first section to a top of the shell such that the top is circumferentially smaller than the bottom;

a first panel positioned in the interior space and coupled to the back of the shell such that the first panel is positioned for rigidifying the back, the first panel comprising paperboard;

a second panel positioned between the first panel and the shell, the second panel comprising foamed elastomer wherein the second panel is configured for acoustic dampening, the second panel comprising extruded polystyrene foam;

an insulation layer positioned in the interior space and coupled to an inner surface of the shell wherein the insulation layer is configured for acoustic dampening, the insulation layer comprising high-temperature mineral wool such that the insulation layer is fire resistant;

a first orifice positioned in the back of the shell and extending through the second panel, the first panel, and the insulation layer, the first orifice being positioned proximate the first side of the shell wherein the first orifice is configured for aligning with an exhaust port of the engine of the leaf blower for venting exhaust from the interior space; and

a plug positioned in the first orifice, the plug comprising steel wool where the plug is configured for venting of exhaust from the interior space and for attenuating the sound generated by the engine of the leaf blower; and a plurality of perforations positioned in the back of the shell proximate a second side of the shell, the plurality of perforations being circularly arranged such that the plurality of perforations is positioned for creating a second orifice through the shell, the second panel, the first panel, and the insulation layer wherein the second orifice is configured for aligning with an exhaust port of the engine of the leaf blower for venting exhaust from the interior space.

2. The device of claim 1 , further including a mesh coupled to and overlaying the insulation layer, the mesh comprising metal wherein the mesh is configured for protecting the insulation layer from physical damage from contacting the engine compartment of the leaf blower.

3. The device of claim 1 , further comprising:

the first cutout extending from a bottom of the shell to proximate to a top of the shell, the first cutout being arcuate distal from the bottom such that the first cutout is shaped substantially complementarily to a front edge of the engine compartment of the leaf blower; and

the second cutout being positioned proximate to the bottom of the shell, the second cutout being contiguous to the first cutout.

4. The device of claim 3 , further including a third cutout extending from the front of the shell into the top of the shell, the third cutout being contiguous to the first cutout, the third cutout being shaped substantially complementarily to a handle of the leaf blower wherein the third cutout is configured for inserting the handle concurrently with the engine compartment of the leaf blower being inserted through the first cutout into the interior space.

5. The device of claim 1 , further including the coupler comprising:

a strap;

a pair of first connectors, each first connector being coupled to the strap proximate to a respective opposing end of the strap; and

a pair of second connectors, the second connectors being coupled singly to the first side and a second side of the shell proximate to the front of the shell, the second connectors being complementary to the first connectors wherein the strap is configured for positioning around the engine compartment of the leaf blower positioning each second connector for removably coupling to a respective first connector for coupling the shell to the engine compartment, the second connector and the respective first connector comprising a hook and loop fastener.

6. The device of claim 1 , further comprising:

a left side panel selectively couplable to the front of the shell proximate to the first side of the shell such that the left side panel partially covers the first cutout; and

a right side panel hingedly coupled to a second side of the shell and selectively couplable to the front of the shell proximate to the second side of the shell such that the right side panel partially covers the first cutout and such that the left side panel and the right side panel are positioned for rigidifying the front of the shell and for closing gaps between the shell and the engine compartment of the leaf blower.

7. The device of claim 6 , further including a pair of hinges, each hinge being coupled to and extending between the right side panel and the second side of the shell such that the right side panel is hingedly coupled to the shell.

8. The device of claim 6 , further comprising:

a pair of second hook and loop fasteners coupled to and extending between the left side panel and the shell such that the left side panel is selectively couplable to the shell; and

a pair of third hook and loop fasteners coupled to and extending between the right side panel and the shell such that the right side panel is selectively couplable to the shell.

9. A sound attenuation device comprising:

a shell defining an interior space, the shell being insulated, the shell comprising at least one of polyurethane coated polyester, polyethylene, and plastic such that the shell is substantially impermeable to water, the shell being substantially rectangularly box shaped, the shell having a back comprising a first section and a second section, the first section extending perpendicularly from a bottom of the shell, the second section extending transversely from the first section to a top of the shell such that the top is circumferentially smaller than the bottom;

a first panel positioned in the interior space and coupled to the back of the shell such that the first panel is positioned for rigidifying the back, the first panel comprising paperboard;

a second panel positioned between the first panel and the shell, the second panel comprising foamed elastomer wherein the second panel is configured for acoustic dampening, the second panel comprising extruded polystyrene foam;

an insulation layer positioned in the interior space and coupled to an inner surface of the shell wherein the insulation layer is configured for acoustic dampening, the insulation layer comprising high-temperature mineral wool such that the insulation layer is fire resistant;

a mesh coupled to and overlaying the insulation layer, the mesh comprising metal wherein the mesh is configured for protecting the insulation layer from physical damage from contacting the engine compartment of the leaf blower;

a first cutout positioned in a front of the shell, the first cutout being shaped substantially complementarily to an engine compartment of a leaf blower, the first cutout extending from the bottom of the shell to proximate to the top of the shell, the first cutout being arcuate distal from the bottom such that the first cutout is shaped substantially complementarily to a front edge of the engine compartment of the leaf blower;

a second cutout extending from the front of the shell into a first side of the shell, the second cutout being shaped substantially complementarily to a cross-sectional profile of a pipe of the leaf blower wherein the first cutout is configured for inserting the engine compartment of the leaf blower into the interior space such that the pipe extends from the shell through the second cutout, the second cutout being positioned proximate to the bottom of the shell, the second cutout being contiguous to the first cutout;

a third cutout extending from the front of the shell into the top of the shell, the third cutout being contiguous to the first cutout, the third cutout being shaped substantially complementarily to a handle of the leaf blower wherein the third cutout is configured for inserting the handle concurrently with the engine compartment of the leaf blower being inserted through the first cutout into the interior space;

a coupler coupled to the shell proximate to the front, the coupler being configured for coupling the shell to the leaf blower such that the shell substantially encapsulates the engine compartment wherein the shell is configured for attenuating sound generated by an engine of the leaf blower, the coupler comprising:

a strap,

a pair of first connectors, each first connector being coupled to the strap proximate to a respective opposing end of the strap, and

a pair of second connectors, the second connectors being coupled singly to the first side and a second side of the shell proximate to the front of the shell, the second connectors being complementary to the first connectors wherein the strap is configured for positioning around the engine compartment of the leaf blower positioning each second connector for removably coupling to a respective first connector for coupling the shell to the engine compartment, the second connector and the respective first connector comprising a hook and loop fastener;

a first orifice positioned in the back of the shell and extending through the second panel, the first panel, and the insulation layer, the first orifice being positioned proximate the first side of the shell wherein the first orifice is configured for aligning with an exhaust port of the engine of the leaf blower for venting exhaust from the interior space;

a plug positioned in the first orifice, the plug comprising steel wool where the plug is configured for venting of exhaust from the interior space and for attenuating the sound generated by the engine of the leaf blower;

a plurality of perforations positioned in the back of the shell proximate the second side of the shell, the plurality of perforations being circularly arranged such that the plurality of perforations is positioned for creating a second orifice through the shell, the second panel, the first panel, and the insulation layer wherein the second orifice is configured for aligning with an exhaust port of the engine of the leaf blower for venting exhaust from the interior space;

a left side panel selectively couplable to the front of the shell proximate to the first side of the shell such that the left side panel partially covers the first cutout;

a right side panel hingedly coupled to the second side of the shell and selectively couplable to the front of the shell proximate to the second side of the shell such that the right side panel partially covers the first cutout and such that the left side panel and the right side panel are positioned for rigidifying the front of the shell and for closing gaps between the shell and the engine compartment of the leaf blower;

a pair of hinges, each hinge being coupled to and extending between the right side panel and the second side of the shell such that the right side panel is hingedly coupled to the shell;

a pair of second hook and loop fasteners coupled to and extending between the left side panel and the shell such that the left side panel is selectively couplable to the shell; and

a pair of third hook and loop fasteners coupled to and extending between the right side panel and the shell such that the right side panel is selectively couplable to the shell.