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Related Experiment Video

Updated: Aug 21, 2025

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
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Perceptual hearing sensitivity during vocal production.

Huan Ye1, Jinhong Luo1

  • 1Institute of Evolution and Ecology, School of Life Sciences, Central China Normal University, Wuhan 430079, China.

Iscience
|November 17, 2022
PubMed
Summary

Bats adjust their vocalizations to hear better during echolocation. This study shows bats improve hearing sensitivity by altering call frequency when actively listening, highlighting the importance of studying animals during natural behaviors.

Keywords:
biological sciencesneurosciencesensory neuroscience

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Area of Science:

  • Bioacoustics
  • Auditory Neuroscience
  • Animal Behavior

Background:

  • Vocalization generates self-generated masking, impacting hearing sensitivity.
  • Perceptual hearing during vocal production is not well understood.
  • Echolocating bats offer a model to study hearing during active vocalization.

Purpose of the Study:

  • To measure hearing sensitivity in echolocating bats during passive and active listening.
  • To investigate how vocalizations affect auditory perception in bats.
  • To understand adaptations for sensory feedback during vocal behavior.

Main Methods:

  • Adaptive psychophysical methods were used to measure hearing sensitivity.
  • Tasks included passive listening (PL), active listening (AL), and a phantom echo task.
  • Hearing sensitivity was assessed in the echolocating bat, *Hipposideros pratti*.

Main Results:

  • Bats exhibited best hearing sensitivity (0 dB SPL) in the PL task.
  • Hearing sensitivity was significantly reduced (nearly 40 dB worse) in the echo task.
  • In the AL task, bats increased call frequency (0.8-1.1 kHz), improving hearing sensitivity by 25-29 dB.

Conclusions:

  • Active vocalization significantly impacts auditory perception in echolocating bats.
  • Bats can modulate vocalizations to enhance hearing sensitivity during active listening.
  • Studying sensory capabilities during active behaviors is crucial for understanding animal perception.