The voice is audible to humans, one sound resembles the avian species "Petrochelidon ariel" (fairy martin) and transliterated as 'dirrup dirrup'. This twittering call is given when the bat is excited or before leaving the roost to feed. A chirp uttered by the species resembles crickets. The species is generally quiet, but some vocalisation is known in captivity when a squealing sound accompanies a squabble over food. The twittering sound was reported in captivity as hunger, and young will continually emit a chirp when the mother is absent.