Median plane localization using a parametric model of the head-related transfer function based on spectral cues

To examine a simulation method for vertical sound localization, and to clarify which peaks and notches in head-related transfer functions (HRTFs) play a role as spectral cues, localization tests in the median plane were carried out using a parametric HRTF model, which is recomposed only of extracted...

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Bibliographic Details
Published in:Applied acoustics 2007-08, Vol.68 (8), p.835-850
Main Authors: Iida, Kazuhiro, Itoh, Motokuni, Itagaki, Atsue, Morimoto, Masayuki
Format: Article
Language:English
Subjects:
Acoustical measurements and instrumentation
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Head-Related transfer function
Physics
Sound localization
Spectral cue
Spectral notch
Spectral peak
The median plane
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Summary:To examine a simulation method for vertical sound localization, and to clarify which peaks and notches in head-related transfer functions (HRTFs) play a role as spectral cues, localization tests in the median plane were carried out using a parametric HRTF model, which is recomposed only of extracted spectral peaks and notches. The results show that the parametric HRTF recomposed using the first and second notches (N1 and N2) and the first peak (P1) provides almost the same localization accuracy as the measured HRTFs. Observations of the spectral peaks and notches indicate that N1 and N2 change remarkably as the source elevation changes, whereas P1 does not depend on the source elevation. In conclusion, N1 and N2 can be regarded as spectral cues, and the hearing system could utilize P1 as the reference information to analyze N1 and N2.
ISSN:0003-682X
1872-910X
DOI:10.1016/j.apacoust.2006.07.016