Washing machine
ultra sounds are used for seeing a baby in an ultra sound
None ! Some animals such as bats, use ultra-sonic sound to locate prey, and 'see' in the dark.
They use ultra sound waves that are bounced off the bottom of a body of water. Newer depth finders use sonic waves.
There are many different types of ultra sonic devices. One that almost everyone is familiar with is the ultra sound. There are studies looking at what excessive use of these devices can cause, but if used in moderation they haven;t found them to be harmful. You can check http://www.ultrasoundtechnicianschools.org/are-ultrasounds-dangerous/ for more information.
preventive use
Yes but you might gain an enemy
You can use ultra sonic waves to image heart valves, to apply therapeutic heat, and the break up kidney stones, to name just three uses.
They use their pincers to snap at the air and send ultra sonic waves through the ocean
To see an unborn baby in the womb.
Sonic branding is the use of music and sound to help form a brand's identity, as in commercial jingles. Short "sound logos" such as the Intel tones and the McDonald's "I'm Lovin' It" are common examples of sonic branding.
they use ultra sound to clean teeth by vibration
Doesn't matter as long as you have wpe. But some people prefer wpe sonic and wpe ultra.