What are Ultrasonic wave ?

 

What Are Ultrasonic Waves?

• Ultrasonic waves are sound waves that are so high-pitched that humans cannot hear them.
• Humans can hear sounds between 20 Hz to 20,000 Hz (this is called the audible range).
• Ultrasonic waves have frequencies higher than 20,000 Hz, which makes them inaudible to our ears.

How Are Ultrasonic Waves Used?

• Bats: Use ultrasonic waves to "see" in the dark (echolocation).
• Dolphins: Use them to communicate and navigate underwater.