FIG. 1 is a perspective view of the front and right side of a headphone showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

White lines define boundaries of the dark portions in FIGS. 1 and 7. The portions shown in broken lines are for illustrative purposes only and form no part of the claimed design.