The everyday items that use air are humans like you and animals.
High frequency sound above 20,000 Hertz, which is inaudible to humans.
Rutherfordium has no practical use.
the sound caoacity for human beings are from 20 hz to 20000 hz.we use ultrasound to check the defects of metals
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
Animals use ultrasound but i do not know what animals do,
Doctors use ultrasound to check the health of an unborn baby.
yes when you get an ULTRASOUND when your pregnant it use ultrasound waves to show the image.
humas use helium to inflate balloons for a party cardon dioxide is a gas humans beathe out
"Sound" is a mechanical wave traveling through a medium. Ultrasound is sound, but its frequency is higher than humans can hear.
Ultrasound is below the threshold of human hearing. Howler monkeys use ultrasound because it travels much further than higher frequencies.