Work

Use of binaural cues for sound localization in large and small non-echolocating bats: Eidolon helvum and Cynopterus brachyotis

Year: 2010

Type: article

Abstract: The authors determined the ability of two old-world non-echolocating bats, Eidolon helvum and Cynopterus brachyotis, to use binaural time and intensity difference cues for localization. The bats were trained to localize pure tones throughout most of their hearing range from loudspeakers located 30 degrees to the left and right of midline. Both species easily localized high frequency tones, indicating they could use the interaural intensity difference cue. However, neither was able to localize low frequency tones even when the tones were amplitude modulated thereby indicating that they could not use ongoing phase difference cues. The authors now know of eight mammals that do not use binaural phase cues for localization, and some possible reasons for this inability are explored.

Source: The Journal of the Acoustical Society of America

DOI: 10.1121/1.3372717

Authors: Rickye S. Heffner, Gimseong Koay, Henry E. Heffner

Institution: University of Toledo

Language: English

Topic: Bat Biology and Ecology Studies

Subfield: Ecology, Evolution, Behavior and Systematics

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: bronze

Funders: National Institutes of Health, National Institute on Deafness and Other Communication Disorders

Award: EVOLUTION OF SENSORY SYSTEMS