ultrasonography
Reflection.
It bounces back; echoes.
This is probably Echo.
cliff is an open area so when we shout the sound goes echoes
reflection
Ultrasound imaging uses the echoes of sound waves to create images of deep structures in the body. Sound waves are sent into the body, bounce off tissues, and are then detected to create real-time images of organs, muscles, and other structures.
ultrasonography
Ultrasound
Echoes and reflections.
I believe you're talking about sonography. The best known form of which is ultrasound for pregnant women. However, there are many other uses of ultrasound. It is often used to conduct an echocardiogram (an image of the heart), as well as looking for bleeds in the brain.
Ultrasonography
"Fading Echoes" does not inherently have a physical form as it is a concept or idea. However, it could be depicted metaphorically as a sound gradually diminishing in volume or disappearing, or as a visual representation of a memory or image slowly fading away.
Ultra Sound
Echoes means the repetition of a sound caused by the refection of sound and waves.
Reverberations.
Containing structures that reflect high-frequency sound waves and thus can be imaged by ultrasound techniques. In ultrasonography:- giving rise to reflections (echoes) of ultrasound waves; hyperechoic.
Echoes of sound and images in a mirror involves sound waves and light waves respectively being reflected off a surface.