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Only about 10% of all animals produce sound. Moreover, sound is said to be a very energy-inefficient method of communication. So why do these animals bother to make sounds? Join Professor Jang Yi-kwon of Ewha Womans University as we explore the different sound generation methods of various animals and the survival strategies embedded in those sounds. ▶ Watch Again

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Timeline

00:00 Start

01:27 Behavioral Ecologist Studying Animal Sounds

02:45 Acoustic Ecology: Understanding Animal Sounds

04:34 What is the Proportion of Sound-Making Animals?

06:13 Why Are There So Few Sound-Making Animals?

07:21 Why Do They Communicate Through Sound?

08:21 How Do Animals Create Sound? 09:42 The principle behind how small frogs make loud noises

12:10 Why do animals emit low and high frequencies?

13:41 [Unreleased] What are the criteria for animals emitting high and low frequencies?

14:04 Why do animals growl in a low voice?

15:03 The scary(?) koala that growls like a beast

15:58 Why do mothers and babies use different frequencies?

17:08 Why do bats utilize high frequencies?

21:36 A life-or-death ultrasonic war! Bats vs. Moths

24:21 Moths' survival strategy: Ultrasonic disruption!

27:27 [Unreleased] Why do animals make so many sounds at night?

28:37 Why do sounds differ among animals? Differentiation of acoustic niches

29:48 Sound war! Suwon Tree Frog vs. Tree Frog

36:26 How do marine animals make sounds? 39:40 What are crickets saying?

44:13 The cricket that voluntarily lost its voice

46:44 Why should we study animal sounds?

48:13 Next story

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