When the outer crystals are excited earlier than the inner crystals it has a curved pattern that creates a ______ sound beam.

When the outer crystals are excited earlier than the inner crystals it has a curved pattern that creates a ______ sound beam.

• A. Unfocused
• B. Focused
• C. Narrow
• D. Wide

Answer: (B)

This is about how a phased-array ultrasound transducer shapes its beam. When you time the outer crystals to fire earlier than the inner ones, the wavefronts from all elements are brought into phase at a specific point along the beam axis. That curved wavefront causes the energy to converge, producing a focused sound beam with higher intensity at the focal region. Without this delay pattern, the beam would stay unfocused or spread out more widely. So the described timing creates a focused beam.

This is about how a phased-array ultrasound transducer shapes its beam. When you time the outer crystals to fire earlier than the inner ones, the wavefronts from all elements are brought into phase at a specific point along the beam axis. That curved wavefront causes the energy to converge, producing a focused sound beam with higher intensity at the focal region. Without this delay pattern, the beam would stay unfocused or spread out more widely. So the described timing creates a focused beam.