The back surface configuration for ear module is the portion of an ear module that is positioned against the ear and works as part of a personal sound system.
FIG. 1 is a top, back, left side isometric view of a back surface configuration for ear module showing our new design;
FIG. 2 is a top, back, right side isometric view thereof;
FIG. 3 is a bottom, front, left side isometric view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a right side elevational view thereof; and,
FIG. 7 is a left elevational view thereof.
The broken line showing of front surface configuration for ear module is for illustrative purposes only and forms no part of the claimed design.