Steering sound beams electronically produces images of which shape compared to rectangular images?

Steering sound beams electronically produces images of which shape compared to rectangular images?

• A. Circular
• B. Rectangular
• C. Elliptical
• D. Parallelogram

Answer: (D)

Steered beams change the orientation of the scan lines. When the beam is electronically steered, each line is emitted at a slight angle rather than straight ahead, so the collection of lines is slanted. The resulting field of view has sides that stay parallel but are tilted, forming a parallelogram shape. If beams aren’t steered and the lines are parallel, the image field tends to be rectangular. Steering doesn’t create a circular or elliptical boundary, and it doesn’t revert to a perfect rectangle; the angled lines produce the skewed parallelogram boundary.

Steered beams change the orientation of the scan lines. When the beam is electronically steered, each line is emitted at a slight angle rather than straight ahead, so the collection of lines is slanted. The resulting field of view has sides that stay parallel but are tilted, forming a parallelogram shape. If beams aren’t steered and the lines are parallel, the image field tends to be rectangular. Steering doesn’t create a circular or elliptical boundary, and it doesn’t revert to a perfect rectangle; the angled lines produce the skewed parallelogram boundary.