Ear acoustic authentication is a type of biometric authentication that uses the ear canal transfer characteristics that show the acoustic characteristics of the ear canal. In ear acoustic authentication, biological information can be acquired from both ears. However, extant literature on an accuracy improvement method using binaural features is inadequate. In this study we experimentally determine a feature that represents the difference between each user to perform a highly accurate authentication. Feature selection was performed by changing the combination of binaural features, and they were evaluated using the ratio of between-class and within-class variance and equal error ratio (EER). We concluded that a method that concatenates the features of both ears has the highest performance.
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