Audiogram of the big brown bat (Eptesicus fuscus).

  title={Audiogram of the big brown bat (Eptesicus fuscus).},
  author={Gimseong Koay and Henry E Heffner and Rickye S. Heffner},
  journal={Hearing research},
  volume={105 1-2},
The audiograms of three big brown bats (Eptesicus fuscus) were determined using a conditioned avoidance procedure. The average audiogram ranged from 0.850 kHz at 106 dB to 120 kHz at 83 dB SPL, with a best threshold of 7 dB at 20 kHz and a distinct decrease in sensitivity at 45 kHz. The results confirm those of a previous study by Dalland (1965a) that the big brown bat has good high-frequency hearing coupled with poor low-frequency hearing. Comparative analysis suggests that the bat's good high… CONTINUE READING