The mark consists of a geometric figure to the left which is a large circle with a brown exterior edge, with an orange interior and a black "D" in the center of the circle. The second geometric figure is a hexagon that partially covers the lower right portion of the previously described circle. An arrow extends from the lower right side of the hexagon. The exterior sides of the hexagon and the arrow extending from the aforementioned side are black. The interior of the hexagon is red and a white "T" is in the center of the hexagon. The third geometric figure is a smaller circle. The interior of the circle is yellow and a black "A" is in the center of the circle. The fourth geometric figure is a smaller circle. The exterior of the circle is red, and a red arrow extends from the upper right edge of the circle to the left. The interior of the circle is brown and a white "R" is in the center of the circle. The words "Duncan turner acoustic research" and a vertical line appears below the four geometric figures and these words and line appear in black.