The ornamental design for a headphoneencrustment, as shown and described.
FIG. 1 is an exploded perspective view of a headphone encrustment showing our new design;
FIG. 2 is a perspective view thereof;
FIG. 3 is an exploded back side elevational view thereof;
FIG. 4 is a back side elevational view thereof;
FIG. 5 is an exploded front side elevational view thereof;
FIG. 6 is a front side elevational view thereof; and,
FIG. 7 is an outside elevational view thereof.
The broken line showing at the boundary of the inside surface of the headphone encrustment defines the bounds of the claimed design and forms no part thereof. The broken line showing of a headphone and elements on the back of the headphone encrustment is for the purposes of illustrating environmental structure and a portion of the article and forms no part of the claimed design.