Extended Data Fig. 13: Behavioral recording methodology.
From: Convergent vocal representations in parrot and human forebrain motor networks
a, Photograph of recording arena for budgerigars with one budgerigar tethered on each side. b, Example recordings from an omnidirectional ambient microphone (top) and two piezoelectric microphones implanted on two budgerigars (bottom). Piezoelectric microphones enable excellent isolation of individual vocalizations which are mixed in the ambient microphone.
