On two possible mechanisms for call directionality steering in the rufous horseshoe bat, Rhinolophus rouxi

摘要

For CF/FM bats to steer their call directionality during the call, we proposed two methods: the first one uses noseleaf or nostril deformations, the second one introduces phase sweeps between the signals emitted through the nostrils. Despite the fact that noseleaf deformations are not documented in the Rhinolophus rouxi, they were observed in other noseleaved bats, such as the Phyllostomus discolor. However, our simulation results suggest that biologically plausible deformations of the noseleaf have only a minimal effect on the call directionality.