Responses of auditory-cortex neurons to structural features of natural sounds

摘要: Sound-processing strategies that use the highly non-random structure of natural sounds may confer evolutionary advantage to many species. Auditory processing has been studied almost exclusively in context species-specific vocalizations1,2,3,4, although these form only a small part acoustic biotope5. To study relationships between properties soundscapes and neuronal mechanisms auditory system, we analysed sound from range different environments. Here show for non-animal background mixtures animal sounds, energy frequency bands is coherently modulated. Co-modulation noise facilitates detection tones by humans, phenomenon known as co-modulation masking release (CMR)6,7. We also improves ability auditory-cortex neurons detect noise, propose this property underlie behavioural CMR. This correspondence represent an adaptation system attribute facilitate real-world tasks.