* Mechanical Waves: Mechanical waves require a medium to travel. They are caused by the vibration of particles within that medium, transferring energy through the medium without transferring matter.
* Ultrasound: Ultrasound waves are sound waves with frequencies higher than the upper limit of human hearing (generally considered to be around 20,000 Hz).
* Sound Waves: Sound waves are longitudinal waves, meaning the particles in the medium vibrate parallel to the direction of the wave's travel.
In summary: Ultrasound waves are a specific type of sound wave, which is a type of mechanical wave. They rely on the vibration of particles within a medium (like air, water, or tissue) to propagate and carry energy.
