FIG. 1 is a front and side perspective view of an acoustic transducer, showing our new design; FIG. 2 is a front view thereof; FIG. 3 is a rear view thereof; FIG. 4 is a side view thereof taken from the right of FIG. 2; FIG. 5 is a side view thereof taken from the left of FIG. 2; FIG. 6 is a top view thereof; and, FIG. 7 is a bottom view thereof.