The resting frequency of echolocation signals changes with body temperature in the hipposiderid bat Hipposideros armiger.

ABSTRACT: Doppler shift (DS) compensating bats adjust in flight the second harmonic of the constant-frequency component (CF2) of their echolocation signals so that the frequency of the Doppler-shifted echoes returning from ahead is kept constant with high precision (0.1-0.2%) at the so-called reference frequency (fref). This feedback adjustment is mediated by an audio-vocal control system that correlates with a maximal activation of the foveal resonance area in the cochlea. Stationary bats adjust the average CF2 with similar precision at the resting frequency (frest), which is slightly below the fref. Over a range of time periods (from minutes up to years), variations of the coupled fref and frest have been observed, and were attributed to age, social influences and behavioural situations in rhinolo

SUBMITTER: Schoeppler D 

PROVIDER: S-EPMC8918815 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature