According to Huygen's Principle, what produces wave interference?

Huygen's Principle states that every point on a wavefront can be considered as a source of tiny wavelets that spread out in all directions. When these wavelets overlap or interact, they can create constructive or destructive interference, which ultimately shapes the resultant wavefront. Therefore, multiple wavelets produced at the face of the transducer play a crucial role in this principle, leading to interference patterns that are foundational to understanding how ultrasound waves propagate through tissues.

This interaction of wavelets is essential in creating images during sonography, as it results in varying amplitudes and phases that contribute to the formation of the ultrasound image. In practical terms, this principle not only illustrates how ultrasound waves travel but also helps explain the focusing and directionality of the emitted sound waves from the transducer, which are vital for accurate imaging.