Once upon a time, there was a little bat named Benny. Benny was different from all the other bats because he was fascinated by the world of sound. He loved to study how sound waves worked and how animals used them to communicate, hunt, and navigate.

One day, Benny decided to explore the sounds of the underwater world. He went to the ocean and started using his sonar to send out high-pitched sound waves. These waves would bounce off objects in the water and come back to him, creating an image of his surroundings.

As he was exploring, Benny noticed something strange. He heard a loud, vibrating noise that made his whole body shake. It was a sonic boom! He had never heard anything like it before.

Benny flew closer to the source of the sound and discovered a school of dolphins using ultrasonic sound waves to communicate with each other. These sound waves were so high-pitched that humans couldn't hear them, but Benny's cochlea, a part of his ear, was able to pick up the vibrations.

He also learned that the dolphins used different pitches and decibels, or the volume of a sound, to convey different messages. One high-pitched sound meant "food is over there," while a low-pitched sound meant "watch out for danger."

Benny was amazed by the power of sound and how different animals used it in their own unique ways. From that day on, he continued to explore the world of sound and learn more about how it worked.

The end.

Reflections

1. What was Benny the bat's special interest?
2. What did Benny use to explore the underwater world?
3. What did Benny hear that made him fly closer to the source?
4. How do the dolphins communicate with each other?
5. What did Benny learn about the power of sound?
6. What part of Benny's ear helped him hear the ultrasonic sound waves?
7. Can humans hear ultrasonic sound waves? Why or why not?