Understanding a talker of interest from a complex background is a common and difficult listening task not just restricted to cocktail parties. Recent work demonstrates that high frequencies in speech are important for accurately localizing the talker and that perceived differences in the locations of talkers are important in solving the cocktail party problem. This paper describes experiments demonstrating that high frequencies contribute to the spatial release from masking by other talkers. In addition, low frequency energy at the fundamental frequency of the talker, over and above the perception of the fundamental frequency, also plays a role in spatial release from masking.
https://www.aes.org/e-lib/browse.cfm?elib=13603
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