Final answer:
Ultrasonography, a nondestructive testing method using high-frequency vibrations, detects defects in materials and is used in industry, the military, and medicine.
Step-by-step explanation:
The examination method that uses high-frequency vibrations to locate defects is known as ultrasonography. This technique is crucial in nondestructive testing across various industries and the military for ensuring the integrity of materials and components. Ultrasonography leverages the principle that ultrasound waves reflect well from significant changes in density, making it possible to detect cracks and voids in solids like aircraft wings, which are too small to be seen with x-rays. Additionally, this method is invaluable in medical diagnoses, such as monitoring fetal development, due to its non-invasive nature.