Think like an Acoustician! Pt.3

Course Content

Lesson 3 of 4
01h : 50m

Ingenia Context [5 min]

Script: Hello, acousticians! Thank you for helping us to learn about the ways people and animals use sound to learn about the world around them. Today, you’ll be learning more about echolocation and some of the animals that use this special capability to help them survive. Do you remember what echolocation means? (wait for student response) That’s right! Echolocation is the process of identifying the location of objects by reflected sound–and sonar is a technology that was inspired by the echolocation used by animals. Let’s do a quick activity to remind ourselves how echolocation works.

ENGAGE

Can You Echolocate? [10 mins] 

Script: In the last activity, you experienced echolocation by engaging in an activity with a partner. Typically, humans cannot echolocate to the ability of animals, but there are some instances where a person who lacks another sense (someone who is blind) does learn to echolocate to create a mental picture of their surroundings. Today, we’ll do a similar activity as a whole class. You’ll all wear blindfolds as I drop a pencil in different locations around the classroom. I’m going to try and be very quiet and sneaky as I move around the classroom. When you think you know the location of the sound, point to it. Wait for me to say, “one, two, three, see!” before removing your blindfold.

  • Engage students in this quick activity with at least 4 different locations in your classroom.

This Animal Can Echolocate! [35 mins] 

Students will learn about unique facts of animals that use echolocation..  

Materials: for the class

  • Animal Echolocation pages (print and post around your classroom): whale, bat, shrew, oilbird, dolphin

5 min Script: In the last lesson, we learned about echolocation and how people, inspired by echolocation, have created and use sonar to “see” hard to reach places. Today, you’ll learn about different animals that use echolocation. First, you’ll learn about each animal by rotating around the classroom in small groups, and after that we'll play a game where you’ll select one animal to play.

30 min Group students and dismiss them by groups to each Animal Echolocation page. Consider grouping students with varied reading abilities together so readers can support non-readers in learning about each animal. Rotate student groups every~5 minutes until all students have read each Animal Echolocation page.

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INTERACT

This Animal Can Echolocate! Game  [35 mins] 

Students will use what they’ve learned about the different animals that use echolocation to select an animal character and play through a role-play style game.

Materials: for the class
- 5 copies of each animal card: whale, bat, shrew, oilbird, dolphin
- Masking or Painters tape - use tape to mark a start and finish line approximately 10-20 feet apart in your classroom.

5 min Script: Now that we’ve learned about different animals that use echolocation, you’ll put these animal powers to the test. In this game, you’ll pick 1 animal to play. Everyone will start at this line, and as you listen to the different scenarios, your selected animal will either take steps forward, stay where you are, or take steps backward. We’ll keep playing until 1 animal crosses the finish line first. (Note, you can continue to play using additional scenarios until all animals have crossed the finish line.)

20 min Have students each select an animal card and stand at the start line. Read through the various scenarios:

  1. It’s the middle of the night in a dark, deep forest. Some animals can echolocate in the dark. If you animal can echolocate in a dark forest, take 2 steps forward (bat, shrew, oilbird)
  2. You’ve reached the deep ocean! Some animals can echolocate under water. If your animal can echolocate through water, take two steps forward (whale, dolphin).
  3. You’ve made it through the ocean, and now there are a series of tunnels through the ground. If your animal can echolocate underground, take 2 steps forward (shrew). If your animal cannot echolocate underground, take 1 step backward (whale, dolphin, oilbird, bat).
  4. It’s time to eat. Through the pitch-black night buzz all kinds of insects. If your animal can catch flying insects with the help of echolocation, take 2 steps forward (bat, oilbird). If your animal cannot, stay where you are.
  5. Some animals can find food on land even in the dark. If your animal uses echolocation to catch food on land, take 1 step forward (shrew, bat, oilbird). If your animal cannot, stay where you are. 
  6. There is also food to be found in the deep, dark ocean. If your animal uses echolocation to find food in the ocean, take 2 steps forward (whale, dolphin). If your animal cannot, stay where you are.
  7. You’ve been separated from your family and are lost. If your animal can use echolocation to communicate with others in your family, take 3 steps forward (all animals).

TIP: You can continue the game with more prompts created by yourself and your students based on the echolocation facts for each animal.

10 min Gather students together once the game is done. Have students turn and talk using the following questions:

  • How did the echolocation abilities of your animal help or hurt it in the game?
  • Why is echolocation an important ability  for your animal?
  • If you played the game again would you choose a different animal? Why or why not?

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ENGAGE

Echolocation in the Wild [20 min]

10 min Watch: Echolocation: The Evolution of a Superpower (www.youtube.com/@animalogic)

10 min Discuss:

  • Which animals have the best echolocation capabilities? Bats. They can use all different frequencies of sounds to make clear images of their surroundings. Their ears are developed to hear very high pitched sounds.
  • Which senses do dolphins not use when navigating their environment? Sense of sight or smell. Instead, they use echolocation.
  • How do dolphins use their heads, or melons, to send pulses of sound via echolocation? The melon, or fatty part of a dolphins head, can change shape to better focus the pulses of sound in a certain direction.
  • How are the sounds a shrew make different from the sounds of other echolocators like bats, dolphins, and whales? The sounds a shrew makes are able to be heard by humans. The shrew’s echolocation abilities are not as complex or advanced as other animals.
  • Why do scientists think oil birds use echolocation? To navigate the pitch-black cave systems they live in. 

Homework [5 min]

Have students select one the animals they learned about that uses echolocation to write a 3 part “day in the life” journal entry. Based on the animal’s behavior, students should write about what that animal is doing in the morning, during the day, and at night, and how it uses or does not use echolocation at those different times of day.

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