Sound Deadening Mat for Use in Transportation Units

FIG. 1 is a top, perspective view of a sound deadening mat for use in transportation units, showing my new design; FIG. 2 is a front elevation view thereof; FIG. 3 is a side elevation view thereof; FIG. 4 is a bottom view thereof and, FIG. 5 is a rear elevation view thereof; and, FIG. 6 is a partial cross-sectional view thereof, taken along lines 6 - 6 in FIG. 2 . The dash-dash style broken lines depict portions of the sound deadening mat for use in transportation units, which form no part of the claimed design. The long dash-short dash-short dash-long dash style broken lines depict boundaries of the claimed design and form no part of the claimed design. The long dash-short dash-short dash-long dash style broken lines in FIG. 2 depict cross-sectional cut indicators and form no part of the claimed design.