Hearing aid

FIG. 1 is a front elevational view of a hearing aid showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a bottom, front and right side perspective view thereof; and,

FIG. 8 is a top, rear and left side perspective view thereof.

The broken lines in the drawings illustrate portions of the hearing aid which form no part of the claimed design.