Acoustic duct

Description

FIG. 1 is a front, right side and top perspective view of an acoustic duct showing our new design;

FIG. 2 is a rear, left side and top perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design.

Claims

The ornamental design for an acoustic duct, as shown and described.