ultrasound
Ultrasound is a high-frequency sound wave inaudible to humans. In medical settings, it is wielded like a magic wand to peer inside the body. Marketing materials promise "pain-free" and "real-time" insights, while the machine itself inspires anxiety and cold sweats. In industrial and animal research, it silently pummels samples, churning out conclusions. People place their trust in silent vibrations, perpetuating the myth of the echo.