The ornamental design for a sounddeflector, as shown and described.
FIG. 1 is a perspective view of a sound deflector showing my new design;
FIG. 2 is an enlarged top plan view thereof;
FIG. 3 is an enlarged front elevational view thereof; and,
FIG. 4 is an enlarged right side elevational view thereof, the left side elevational view being a mirror image thereof.
A flat television screen and bottom speakers shown in broken lines are for illustrative purpose only and form no part of the claimed design. FIGS. 2-4 disclose only one of the sound deflectors in details for clarity and it is understood that the undisclosed sound deflector is the same.