Impact of variation in interaural level and time differences due to head rotation in localization of spatially segregated sound

  • Daisuke MorikawaEmail author
Conference paper
Part of the Smart Innovation, Systems and Technologies book series (SIST, volume 63)


In this paper, we clarify the role of variation in interaural level difference (ILD) and interaural time difference (ITD) due to head rotation in localization of spatially segregated sounds. Listeners were asked to distinguish between two sources of white noises having various ILDs/ITDs under head rotation. In ILD condition, the segregation rate reached 80% when the ILD between two sources at an angular difference of 36° corresponded to different sides, i.e., left and right hemisphere. However, the sound image was integrated into one when the sources corresponded to the same side. In ITD condition, two or three images were perceived regardless of the ITDs. This was because when only one source was used, it was perceived as separate lower- and higher-frequency images. In confirmations with low- and high-pass noises, the lower-frequency image was contained for lower than 1.2 kHz and the higher-frequency one was contained for higher than 1.7 kHz.


Interaural level difference Interaural time difference Spatially segregated sound Sound localization Head rotation 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    E. C. Cherry: Some experiments on the recognition of speech with one and two ears, J. Acoust. Soc. Am., Vol. 25, No. 5, pp. 975–979 (1953)Google Scholar
  2. 2.
    J. Blauert: Spatial Hearing, The MIT press, Cambridge, MA., (1997)Google Scholar
  3. 3.
    H. Wallach: The role of head movements and vestibular and visual cues in sound localization, J. Exp. Psychol., Vol. 27, No. 4, pp. 339–368 (1940)Google Scholar
  4. 4.
    B. C. J. Moore: An Introduction to the Psychology of Hearing: Sixth Edition, pp. 271–275, Brill, Leiden, The Netherlands (2012)Google Scholar
  5. 5.
    M. Ebata, T. Sone, T.Nimura: improvement of hearing ability by directional information, J. Acoust. Soc. Am., Vol.43, No. 2, pp. 289–297 (1968)Google Scholar
  6. 6.
    N. Kuroda, J. Li, Y. Iwaya, M.Unoki, M. Akagi,: Effects of spatial cues on detectability of alarm signals in noisy environments, Principles and Applications of Spatial Hearing, World Scientific, Singapore, pp. 484–493 (2011)Google Scholar
  7. 7.
    D. Morikawa: Effect of interaural difference for localization of spatially segregated sound, Proc. IIH-MSP 2014, pp.602–605, Kita-kyusyu, Japan (2014)Google Scholar
  8. 8.
    M. Otani, T. Hirahara: Auditory Artifacts due to Switching Head-Related Transfer Functions of a Dynamic Virtual Auditory Display, IEICE TRANS.Google Scholar
  9. 9.
    FUNDAMENTALS, Vol. E91-A, No. 6, pp.1320–1328 (2008)Google Scholar
  10. 10.
    G. F. Kuhn: Model for the interaural time differences in the azimuthal plane, J. Acoust. Soc. Am., Vol.62, No. 1, pp. 157–167 (1977)Google Scholar

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Graduate School of Advanced Science and TechnologyJapan Advanced Institute of Science and TechnologyNomi, IshikawaJapan

Personalised recommendations