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Hearing in the elephant (Elephas maximus): absolute sensitivity, frequency discrimination, and sound localization
Journal of Comparative and Physiological Psychology
|December 1, 1982
Summary
Indian elephants possess exceptional hearing sensitivity, particularly for low frequencies, and demonstrate remarkable sound localization abilities comparable to humans. This study reveals unique auditory capabilities in elephants.
Area of Science:
- Auditory Neuroscience
- Animal Behavior
- Mammalian Physiology
Background:
- Understanding the auditory capabilities of elephants is crucial for conservation efforts and interspecies communication.
- Mammalian hearing varies significantly across species, with limited data on elephant auditory perception.
Purpose of the Study:
- To investigate the absolute hearing sensitivity, frequency discrimination, and sound localization abilities of a young Indian elephant.
- To compare the elephant's auditory thresholds with those of other mammals, including humans.
Main Methods:
- Psychoacoustic testing was employed to determine the elephant's audibility curve, frequency-discrimination thresholds, and sound-localization thresholds.
- Standardized behavioral audiometry and sound-localization tasks were utilized.
Main Results:
- The elephant exhibited an audibility curve similar to other mammals but showed heightened sensitivity to low frequencies and reduced sensitivity to high frequencies.
- Frequency discrimination thresholds at low frequencies were comparable to human capabilities.
- The elephant demonstrated precise sound localization in the azimuthal plane, with thresholds around 1 degree for broad-band noise.
Conclusions:
- Indian elephants possess a unique auditory profile with enhanced low-frequency sensitivity and excellent sound localization.
- The findings suggest elephants may utilize both binaural time and intensity differences for sound localization, particularly for pure tones.