High frequency sound above 20,000 Hertz, which is inaudible to humans.
Usually infra red, but I have seen some that use ultrasound.
Yes, an ultrasound wave is a type of mechanical wave that carries vibrating energy through a medium, such as air or water. Ultrasound waves consist of high-frequency sound waves that are above the audible range for humans. These waves are commonly used in medical imaging to visualize internal structures of the body.
Bats, as one may know, are blind, and to find it's prey (food) it causes ultrasound, which is invisible of course, imagine a wave, in the ocean, the waves hit something, and the wave is directed back to where it came from, and anything the wave does not hit, continues. That is how bats use ultrasound to hunt.
sorry for the spelling mistake. here it is. Ultrasound is a type of sound wave that has a frequency of over 20,000 so it is nearly impossible for a human to hear it. Bats use it to communicate and to see as they have bad eyesight. They use their echo ultrasound to reflect sound so they know if something is in front of them. Humans use ultrasound to see living cells in the body like when a woman is pregnant they it to scan and measure the baby's heart rate. Mice also hear ultrasound and people use special equipment that use ultrasound to scare the mice and other insects away.
ULTRASOUND produce STSTIONERY wave while pass through LIGUID
Sound, at least in gases like air, can only propagate as a longitudinal wave.
an ultrasound wave is beamed down from a boat and then the wave bounces back from the seabed to a reciever. the longer the wave takes, the deeper the water.
Ultrasound or thermoacoustic refrigeration uses a resonating sound wave to induce a thermal gradient.
The key ultrasound physics formulas used in medical imaging technology include the speed of sound in tissue, the frequency of the ultrasound wave, and the wavelength of the ultrasound wave. These formulas help determine the depth of tissue penetration and image resolution in ultrasound imaging.
Ultrasound can pass through solids because it is a type of mechanical wave that is generated by vibrating particles. The wavelength of ultrasound is smaller than the spacing of particles in a solid, allowing it to penetrate through the material. This property makes ultrasound useful for medical imaging and non-destructive testing of solid objects.
An ultrasound wave (or any other sound wave) is mechanical energy, and can be said to be a mechanical wave. Waves are not elastic. The term elastic may be applied to the medium through which they travel. There are compression and shear forces (among others) that work on the medium, and the medium may present a more or less elastic response.
"Sound" is a mechanical wave traveling through a medium. Ultrasound is sound, but its frequency is higher than humans can hear.