Determining devices to respond to user requests

Abstract

This disclosure describes techniques for selecting which device to respond to user speech within an environment that includes multiple devices. To enable this selection, the techniques described herein create a model indicating a topology of the devices within the environment. To do so, features associated with the user speech are generated and used to generate multi-dimensional points, each representing a corresponding user utterance. The techniques may then group these multi-dimensional points into clusters before projecting the resulting clusters into two dimensions. The two-dimensional clusters may then be used to generate a model (e.g., a Voronoi diagram) representing regions of the environment, with the centroid of each region being associated with a respective device. When a user makes a subsequent request, the user may be localized within one of the regions and the device associated with that region may be chosen to respond to the user.