The ornamental design for an “acoustic imaging device”, as shown and described.
FIG. 1 is a right, front perspective view of an acoustic imaging device having rectangular apertures for microphones.
FIG. 2 is a front view of the acoustic imaging device of FIG. 1.
FIG. 3 is a rear view of the acoustic imaging device of FIG. 1.
FIG. 4 is a top view of the acoustic imaging device of FIG. 1.
FIG. 5 is a bottom view of the acoustic imaging device of FIG. 1.
FIG. 6 is a right side view of the acoustic imaging device of FIG. 1; and,
FIG. 7 is a left side view of the acoustic imaging device of FIG. 1.
The broken lines show portions of the acoustic imaging device that form no part of the claimed design; the broken lines and unshaded surfaces form no part of the claimed design.