Sound is the perception of changes in pressure in the air.
Slow changes of pressure cannot be heard. Once the changes happen faster than 20 times a second, you start to hear sound. Above 16,000 changes per second and it goes beyond human perception.
You need air (or any gas) for sound to exist. Sound cannot be heard in a vacuum.
Ocean waves have a distinct sound that soothes a lot of people and can help people sleep. They make a sort of whooshing sound and almost sounds like the wind mixed with water.
Sonar
Sound waves are longitudinal waves; they travel from side to side, not up and down like transverse waves.
Sound waves are not a type of electromagnetic wave. Sound waves are mechanical vibrations that require a medium, such as air or water, to propagate, whereas electromagnetic waves can travel through a vacuum.
Mechanical waves, such as sound waves, travel through a medium like air, water, or solids. Electromagnetic waves, like light and radio waves, can travel through a vacuum because they do not need a medium to propagate.
People use sound waves in ultrasound scans when women are pregnant. You can hear the noises the baby is making and the sound is through sound waves
You use sound waves to communicate.
coz they can.
Ocean waves have a distinct sound that soothes a lot of people and can help people sleep. They make a sort of whooshing sound and almost sounds like the wind mixed with water.
they use sound waves
Radio sound is heard through the use of radio waves, which are electromagnetic waves that can carry information from one point to another. These waves are transmitted from a radio station and received by a radio receiver, such as a radio or smartphone, which then converts the waves into sound waves that we can hear.
Whales use sound waves to talk to other whales in their own language
Peguins
osilliscope
For eating ;)
Sonar
Detect sound waves.