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Related Concept Videos

Communication01:03

Communication

Communication between two animals occurs when one animal transmits an information signal that causes a change in the animal that receives the information. Organisms communicate with one another in a host of different ways. Signals can be auditory, chemical, visual, tactile, or a combination of these. Communication is a critical behavioral adaptation that promotes survival, growth, and reproduction.
Nonconscious Mimicry01:13

Nonconscious Mimicry

Nonconscious mimicry occurs when individuals alter their mannerisms to match the behaviors and expressions of those nearby, without intention.
Migration00:53

Migration

Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
Echo01:06

Echo

The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case, then the...
Convergent Evolution01:54

Convergent Evolution

Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.

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Electroencephalography Measurements in Awake Marmosets Listening to Conspecific Vocalizations
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An Asian elephant imitates human speech.

Angela S Stoeger1, Daniel Mietchen, Sukhun Oh

  • 1Department of Cognitive Biology, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria. angela.stoeger-horwath@univie.ac.at

Current Biology : CB
|November 6, 2012
PubMed
Summary

A male Asian elephant demonstrates remarkable vocal imitation of human speech, accurately mimicking Korean sounds. This unique ability, achieved by placing his trunk in his mouth, may help form social bonds.

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Area of Science:

  • Bioacoustics
  • Animal Behavior
  • Comparative Psychology

Background:

  • Vocal imitation is observed across species, facilitating cultural transmission of sounds.
  • Instances of cross-species vocal imitation exist, such as parrots mimicking human speech.
  • The Asian elephant (Elephas maximus) is the focus of this study on vocal learning.

Purpose of the Study:

  • To document and analyze the vocal imitation of human speech by a male Asian elephant.
  • To investigate the mechanism and accuracy of the elephant's speech production.
  • To explore the potential social functions of vocal learning in this context.

Main Methods:

  • Detailed acoustic analysis of the elephant's vocalizations compared to human speech.
  • Observation of the elephant's physical technique for producing imitations.
  • Linguistic assessment by native Korean speakers to evaluate intelligibility.

Main Results:

  • The elephant, Koshik, produced highly accurate imitations of Korean speech, matching formant frequencies and fundamental frequency.
  • Native speakers could readily understand and transcribe the elephant's vocalizations.
  • A novel vocal production mechanism involving trunk insertion into the mouth was identified.

Conclusions:

  • This elephant exhibits an unprecedented method of vocal production and formant control.
  • Vocal learning may serve to strengthen social bonds, even across species.
  • The findings offer new insights into the evolution and function of vocal imitation.