alt Hacker NewsEvery ultrasound device makes sound, sometimes a lot of sound, because it's vibrating all of the materials, liquids, and air around it.
Every ultrasound device makes sound, sometimes a lot of sound, because it's vibrating all of the materials, liquids, and air around it.
So does every piece of baryonic matter in the universe, in which case I am proud to be an ultrasound device.