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Interaural Time Difference Thresholds as a Function of Frequency

  • William M. Hartmann
  • Larisa Dunai
  • Tianshu Qu
Conference paper
Part of the Advances in Experimental Medicine and Biology book series (volume 787)

Abstract

Different models of the binaural system make different predictions for the just-detectable interaural time difference (ITD) for sine tones. To test these models, ITD thresholds were measured for human listeners focusing on high- and low-frequency regions. The measured thresholds exhibited a minimum between 700 and 1,000 Hz. As the frequency increased above 1,000 Hz, thresholds rose faster than exponentially. Although finite thresholds could be measured at 1,400 Hz, experiments did not converge at 1,450 Hz and higher. A centroid computation along the interaural delay axis, within the context of the Jeffress model, can successfully simulate the minimum and the high-frequency dependence. In the limit of medium-low frequencies (f), where f . ITD << 1, mathematical approximations predict low-­frequency slopes for the centroid model and for a rate-code model. It was found that measured thresholds were approximately inversely proportional to the ­frequency (slope = –1) in agreement with a rate-code model. However, the centroid model is capable of a wide range of predictions (slopes from 0 to –2).

Keywords

Interaural Time Difference Tone Frequency Medial Superior Olive Interaural Phase Sine Tone 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We are grateful to Les Bernstein, Constantine Trahiotis, and Richard Stern for the helpful conversations about the centroid model. LD was supported by The Vicerectorado de Profesorado y Ordenación Académica of the Universitat Politècnica de Valeència (Spain). TQ was supported by grant 61175043 from the National Natural Science Foundation of China. The work was supported by the NIDCD grant DC-00181 and the AFOSR grant 11NL002.

References

  1. Coffee CS, Ebert CS, Marshall AF, Skaggs JD, Falk SE, Crocker WD, Pearson JM, Fitzpatrick DC (2006) Detection of interaural correlation by neurons in the superior olivary complex, inferior colliculus, and auditory cortex of the unanesthetized rabbit. Hear Res 221:1–16CrossRefGoogle Scholar
  2. Colburn HS (1977) Theory of binaural interaction based on auditory-nerve data II. Detection of tones in noise. J Acoust Soc Am 61:525–533PubMedCrossRefGoogle Scholar
  3. Goldberg JM, Brown PB (1969) Response of binaural neurons of dog superior olivary complex to dichotic tonal stimuli: some physiological mechanisms of sound localization. J Neurophysiol 32:613–636PubMedGoogle Scholar
  4. Jeffress LA (1948) A place theory of sound localization. J Comp Physiol Psychol 41:35–39PubMedCrossRefGoogle Scholar
  5. Joris PX, Carney LH, Smith PH, Yin TCT (1994) Enhancement of neural synchronization in the anteroventral cochlear nucleus. I. Responses to tones at the characteristic frequency. J Neurophysiol 71:1022–1036PubMedGoogle Scholar
  6. Klumpp RB, Eady HR (1956) Some measurements of interaural time difference thresholds. J Acoust Soc Am 28:859–860CrossRefGoogle Scholar
  7. McAlpine D, Jiang D, Palmer AR (2001) A neural code for low-frequency sound localization in mammals. Nat Neurosci 4:396–401PubMedCrossRefGoogle Scholar
  8. Schiano JL, Trahiotis C, Bernstein LR (1986) Lateralization of low-frequency tones and narrow bands of noise. J Acoust Soc Am 79:1563–1570PubMedCrossRefGoogle Scholar
  9. Stern RM, Colburn HS (1978) Theory of binaural interaction based on auditory-nerve data IV. A model for subjective lateral position. J Acoust Soc Am 64:127–140PubMedCrossRefGoogle Scholar
  10. Stern RM, Shear GD (1996) Lateralization and detection of low-frequency binaural stimuli: effects of distribution of internal delay. J Acoust Soc Am 100:2278–2288CrossRefGoogle Scholar
  11. Yin TCT, Chan JCK (1990) Interaural time sensitivity in medial superior olive of cat. J Neurophysiol 64:465–488PubMedGoogle Scholar
  12. Zwislocki J, Feldman RS (1956) Just noticeable differences in dichotic phase. J Acoust Soc Am 28:860–864CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • William M. Hartmann
    • 1
  • Larisa Dunai
    • 2
  • Tianshu Qu
    • 3
  1. 1.Department of Physics and AstronomyMichigan State UniversityEast LansingUSA
  2. 2.Departamento de Ingeniería GráficaUniversitat Politècnica de ValènciaValènciaSpain
  3. 3.Key Laboratory on Machine Perception-Ministry of EducationPeking UniversityBeijingChina

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