Question

Who among the following produces ultrasound?
1. Pigeon
2. Dolphin
3. Elephant
4. Rhinoceros

Answer 1

Correct Answer - Option 2 : Dolphin

CONCEPT:

• Ultrasonic waves or Ultrasound waves: The sound frequency above 20,000Hz is known as ultrasonic waves. Humans cannot detect it too.
  • Examples: dog whistle, Dolphins, Bats, Porpoises, and Rats are examples of an Ultrasound wave.

EXPLANATION:

• The Dolphin produces ultrasound. So option 2 is correct.

• Infrasonic waves: The frequency range of these types of waves is below 20Hz. Humans cannot detect it.
  • Example: Elephants, Sound produced by Earthquake, Volcanic eruption and ocean waves, Weather, Lee waves, Avalanche, Waterfalls, Meteors, Lightening, etc.
• Audible sound waves: The frequency range of this wave is 20Hz - 20000Hz. Humans can easily detect these types of waves.
  • Example: Sound produced by Vocal cords.