The effect of overall level on sensitivity to interaural differences of time and level at high frequencies

Dietz, Mathias; Bernstein, Leslie; Trahiotis, Constantine; Ewert, Stephan D.; Hohmann, Volker

doi:10.1121/1.4807827

Cited by 35 publications

(36 citation statements)

References 18 publications

(47 reference statements)

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“…Apparently the relation does also not hold for the dependence on overall level: Although threshold ITD depends on overall level (e.g., Klein-Hennig et al, 2011;Dietz et al, 2013a) the extent of lateralization does not reveal a significant dependence on overall level. It was previously argued (e.g., Domnitz and Colburn, 1977;Bernstein and Trahiotis, 2011) that ITD (or ILD) discrimination sensitivity is proportional to the mean-displacementto-sound-image-width (variance) ratio.…”

Section: Discussionmentioning

confidence: 93%

The influence of pause, attack, and decay duration of the ongoing envelope on sound lateralization

Dietz

Klein-Hennig

Hohmann

2015

The Journal of the Acoustical Society of America

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Klein-Hennig et al. [J. Acoust. Soc. Am. 129, 3856–3872 (2011)] introduced a class of high-frequency stimuli for which the envelope shape can be altered by independently varying the attack, hold, decay, and pause durations. These stimuli, originally employed for testing the shape dependence of human listeners' sensitivity to interaural temporal differences (ITDs) in the ongoing envelope, were used to measure the lateralization produced by fixed interaural disparities. Consistent with the threshold ITD data, a steep attack and a non-zero pause facilitate strong ITD-based lateralization. In contrast, those conditions resulted in the smallest interaural level-based lateralization.

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Section: Discussionmentioning

confidence: 93%

The influence of pause, attack, and decay duration of the ongoing envelope on sound lateralization

Dietz

Klein-Hennig

Hohmann

2015

The Journal of the Acoustical Society of America

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“…A relationship between the monaural and binaural measures could suggest that limitations at the auditory periphery affect binaural hearing in listeners with CIs. Loudness balancing and centering were conducted under the assumption that differences in loudness and the perception of centered images could affect binaural sensitivity across stimulation sites (Dietz et al 2013; Domnitz et al 1977). In addition to DR and amplitude modulation detection, symmetry in loudness growth between the left and the right ears was examined.…”

Section: Discussionmentioning

confidence: 99%

The Relationship Between Intensity Coding and Binaural Sensitivity in Adults With Cochlear Implants

2017

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Objectives Many bilateral cochlear implant users show sensitivity to binaural information when stimulation is provided using a pair of synchronized electrodes. However, there is large variability in binaural sensitivity between and within participants across stimulation sites in the cochlea. It was hypothesized that within-participant variability in binaural sensitivity is in part affected by limitations and characteristics of the auditory periphery which may be reflected by monaural hearing performance. The objective of this study was to examine the relationship between monaural and binaural hearing performance within participants with bilateral cochlear implants. Design Binaural measures included dichotic signal detection and interaural time difference discrimination thresholds. Diotic signal detection thresholds were also measured. Monaural measures included dynamic range and amplitude modulation detection. In addition, loudness growth was compared between ears. Measures were made at three stimulation sites per listener. Results Greater binaural sensitivity was found with larger dynamic ranges. Poorer interaural time difference discrimination was found with larger difference between comfortable levels of the two ears. In addition, poorer diotic signal detection thresholds were found with larger differences between the dynamic ranges of the two ears. No relationship was found between amplitude modulation detection thresholds or symmetry of loudness growth and the binaural measures. Conclusions The results suggest that some of the variability in binaural hearing performance within listeners across stimulation sites can be explained by factors non-specific to binaural processing. The results are consistent with the idea that dynamic range and comfortable levels relate to peripheral neural survival and the width of the excitation pattern which could affect the fidelity with which central binaural nuclei process bilateral inputs.

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“…The first was a continuous diotic noise, low-passed at 1.3 kHz (spectrum level equivalent to 30 dB SPL). This type of noise has commonly been employed in similar experiments conducted over decades in several different laboratories, including our own (e.g., Hafter, 1976, 1981;Bernstein and Trahiotis, 1994, 2002Dietz et al, 2013). The second background noise was that employed by Majdak and Laback (2009).…”

Section: A Proceduresmentioning

confidence: 98%

Sensitivity to envelope-based interaural delays at high frequencies: Center frequency affects the envelope rate-limitation

Bernstein¹,

Trahiotis²

2014

The Journal of the Acoustical Society of America

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Sensitivity to ongoing interaural temporal disparities (ITDs) was measured using bandpass-filtered pulse trains centered at 4600, 6500, or 9200 Hz. Save for minor differences in the exact center frequencies, those target stimuli were those employed by Majdak and Laback [J. Acoust. Soc. Am. 125, 3903-3913 (2009)]. At each center frequency, threshold ITD was measured for pulse repetition rates ranging from 64 to 609 Hz. The results and quantitative predictions by a cross-correlationbased model indicated that (1) at most pulse repetition rates, threshold ITD increased with center frequency, (2) the cutoff frequency of the putative envelope low-pass filter that determines sensitivity to ITD at high envelope rates appears to be inversely related to center frequency, and (3) both outcomes were accounted for by assuming that, independent of the center frequency, the listeners' decision variable was a constant criterion change in interaural correlation of the stimuli as processed internally. The finding of an inverse relation between center frequency and the envelope rate limitation, while consistent with much prior literature, runs counter to the conclusion reached by Majdak and Laback.

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The effect of overall level on sensitivity to interaural differences of time and level at high frequencies

Cited by 35 publications

References 18 publications

The influence of pause, attack, and decay duration of the ongoing envelope on sound lateralization

The influence of pause, attack, and decay duration of the ongoing envelope on sound lateralization

The Relationship Between Intensity Coding and Binaural Sensitivity in Adults With Cochlear Implants

Sensitivity to envelope-based interaural delays at high frequencies: Center frequency affects the envelope rate-limitation

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