Estimating auditory filter bandwidth using distortion product otoacoustic emissions

Authors

  • Andreas H. Rukjær Acoustics and Audio Technology, Aalborg University, Aalborg, Denmark
  • Sigurd van Hauen Acoustics and Audio Technology, Aalborg University, Aalborg, Denmark
  • Rodrigo Ordoñez Signal and Information Processing, Department of Electronic Systems, Aalborg University, Aalborg, Denmark
  • Dorte Hammershøi Signal and Information Processing, Department of Electronic Systems, Aalborg University, Aalborg, Denmark

Keywords:

distortion product otoacoustic emissions, auditory filters, equivalent rectangular bandwidth, notched-noise thresholds

Abstract

The basic frequency selectivity in the listener’s hearing is often characterized by auditory filters. These filters are determined through listening tests, which estimate the masking threshold as a function of frequency of the tone and the bandwidth of the masking sound. The auditory filters have been shown to be wider for listeners with sensorineural impairment. In a recent study (Christensen et al., 2017) it was demonstrated on group basis that the distortion product stimulus ratio that provided the strongest 2 f1− f2 component at low frequencies had a strong correlation to the theoretical relation between frequency and auditory filter bandwidth, described by the equivalent rectangular bandwidth (ERB, Glasberg and Moore, 1990). The purpose of the present study is to test whether a similar correlation exists on an individual basis at normal audiometric frequencies. The optimal 2 f1 − f2 DPOAE ratio is determined for stimulus ratios between 1.1 and 1.6, at fixed primary levels (L1/L2 = 65/45 dB SPL). The auditory filters are determined using notched-noise method in a two alternative forced choice experiment with noise levels at 40 dB SPL/Hz. Optimal ratios and auditory filters are determined at 1, 2, and 4 kHz for 10 young normal-hearing subjects.

References

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Adaptive processes in hearing

Additional Files

Published

2018-01-10

How to Cite

Rukjær, A. H., van Hauen, S., Ordoñez, R., & Hammershøi, D. (2018). Estimating auditory filter bandwidth using distortion product otoacoustic emissions. Proceedings of the International Symposium on Auditory and Audiological Research, 6, 263–270. Retrieved from https://proceedings.isaar.eu/index.php/isaarproc/article/view/2017-32

Issue

Vol. 6 (2017): Adaptive Processes in Hearing

Section

2017/4. Assessment of specific auditory functions and hearing ability

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