FIG. 1 is a perspective view of a headphone showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a front view thereof in an open position.
Portions of broken lines are for illustrative purposes only and form no part of claimed design.