title: Interpretations on principal components analysis of head-related impulse responses in the median plane.
abstract: A principal components analysis of the median-plane head-related impulse responses (HRIRs) in the CIPIC HRTF database reveals that the individual HRIRs can be reconstructed by a linear combination of 12 principal components (PCs) within 5% of error in the least-squares sense. The PCs include the intersubject and interelevation variations in the median-plane HRIRs. Each PC provides sound cues for the front-back discrimination and/or the vertical perception. There exist common systematic elevation dependencies in the weights of lower-numbered PCs which contribute to the pinna/head diffractions, whereas the elevation dependencies in the weights of higher-numbered PCs are different from subject to subject.
authors.forename: Sungmok
authors.initials: S
authors.lastname: Hwang
authors.forename: Youngjin
authors.initials: Y
authors.lastname: Park
mesh_terms: D001307:Auditory Perception; D003463:Cues; D004192:Discrimination, Psychological; D006257:Head / Q000502:physiology*; D006801:Humans; D009068:Movement / Q000502:physiology*