We are able to instantly and effortlessly recognize individuals on the basis of their speech, but how this challenging task is accomplished by our brains remains a mystery. In this project, a student will assist in the acquisition and analysis of responses to monkey vocalizations while the monkey is performing a vocalization detection task. We will be using multi-cellular array recordings, and the student project will be to see whether the population responses to different vocalization in a specific auditory area are sufficiently fast and reliable to explain vocalization discrimination abilities.