10. The method of claim 9 , wherein determining similarity scores that each indicate a degree of similarity of the utterance vector and one of the speaker vectors in the set comprises determining a cosine distance between the utterance vector and each of the speaker vectors in the set.
10. The method of claim 9 , wherein determining similarity scores that each indicate a degree of similarity of the utterance vector and one of the speaker vectors in the set comprises determining a cosine distance between the utterance vector and each of the speaker vectors in the set. 11. The method of claim 10 , wherein selecting the speaker vector that the similarity scores indicate is most similar to the utterance vector comprises: identifying a smallest cosine distance from among the determined cosine distances; determining that the smallest cosine distance is less than a maximum distance threshold value; and based on determining that the smallest cosine distance is less than the maximum distance threshold value, selecting the speaker vector corresponding to the smallest cosine distance.