Final answer:
Frequency compounding is the ultrasound imaging technique that averages echoes received at multiple frequencies to reduce noise and speckle, thus enhancing image detail.
Step-by-step explanation:
The approach to image production in which the reflected ultrasound beam is averaged among multiple frequencies to lessen the effects of noise and speckle in the image is known as frequency compounding.
In this technique, echoes are received at multiple frequencies, and the number and relative intensity of these multiple frequencies are used to construct a more detailed image with reduced noise and artifacts. Such subtle craftsmanship in utilizing ultrasound technology leads to non-linear effects and enhances the image detail, thus allowing for more precise diagnoses.