Implementations of a portable soundproofing enclosure may include: four side panels coupled together, a top panel coupled to each of the four side panels, the four side panels and the top panel, the top panel including a fan. The panels may form a cavity sized to fully enclose a portable generator. At least two of the four side panels may include an air dam. At least one of the side panels may have a plurality of louvers configured to allow air to be drawn through the panel. The bottom edges of the sides may be configured to rest on a mat.