With linear sequential array transducers ____________ to create each sound wave.

With linear sequential array transducers ____________ to create each sound wave.

• A. All crystals are fired simultaneously
• B. Some crystals are fired sequentially only
• C. Some but not all of the crystals are fired simultaneously
• D. Crystals fired randomly

Answer: (D)

With linear sequential array transducers, the beam for each sound wave is built by energizing crystals in a controlled sequence along the array, not by firing all elements at once. This sequential activation creates a coherent wavefront and allows the scan line to be formed and steered, whereas firing all crystals together would produce a broad, unfocused beam and random firing would destroy coherence. So, a subset of adjacent crystals is activated in a specific order to generate each pulse.

With linear sequential array transducers, the beam for each sound wave is built by energizing crystals in a controlled sequence along the array, not by firing all elements at once. This sequential activation creates a coherent wavefront and allows the scan line to be formed and steered, whereas firing all crystals together would produce a broad, unfocused beam and random firing would destroy coherence. So, a subset of adjacent crystals is activated in a specific order to generate each pulse.