Gain compensation due to differences in refracted angles is called?

The term used for gain compensation that accounts for differences in refracted angles is known as angle-corrected gain (ACG). This type of compensation is necessary because the angle at which the ultrasound beam enters the material can significantly affect the intensity of the sound wave that reflects back to the transducer. Variations in the refracted angle can lead to differences in the received signal amplitude.

Angle-corrected gain adjusts the gain appropriately based on the angle of incidence, ensuring that the responses received from different depths and angles are comparable. By applying ACG, technicians can obtain more accurate images and evaluations of the material being inspected, leading to better defect detection.

In contrast, other terms listed refer to different types of gain adjustments. The distance-amplitude correction (DAC) curve relates to the geometric spreading of sound waves and is used primarily to adjust for echoes received from greater distances, not specifically for refracted angles. Time-corrected gain (TCG) and time-varied gain (TVG) both vary gain based on the time of signal return, which correlates with depth, rather than compensating for angle variations in refraction.

Thus, angle-corrected gain is focused on ensuring consistency in signal amplitude variations caused by changing angles