FIG. 1 is a perspective view of a first embodiment of an ornamental design for an ear cushion;
FIG. 2 is a right side view of the first embodiment thereof;
FIG. 3 is a left side view of the first embodiment thereof;
FIG. 4 is a rear view of the first embodiment thereof;
FIG. 5 is a front view of the first embodiment thereof;
FIG. 6 is a top view of the first embodiment thereof;
FIG. 7 is a bottom view of the first embodiment thereof; and
FIG. 8 is a perspective view of a second embodiment of an ornamental design for an ear cushion;
FIG. 9 is a right side view of the second embodiment thereof;
FIG. 10 is a left side view of the second embodiment thereof;
FIG. 11 is a front view of the second embodiment thereof;
FIG. 12 is a rear view of the second embodiment thereof;
FIG. 13 is a top view of the second embodiment thereof;
FIG. 14 is a bottom view of the second embodiment thereof; and
FIG. 15 is a perspective view of a third embodiment of an ornamental design for an ear cushion;
FIG. 16 is a left side view of the third embodiment thereof;
FIG. 17 is a right side view of the third embodiment thereof;
FIG. 18 is a rear view of the third embodiment thereof;
FIG. 19 is a front view of the third embodiment thereof;
FIG. 20 is a top view of the third embodiment thereof; and,
FIG. 21 is a bottom view of the third embodiment thereof.
The broken lines immediately adjacent the ends of the solid lines represent the bounds of the claimed design while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.