Revisiting the detection of interaural time differences in listeners with hearing loss

Best, Virginia; Swaminathan, Jaichander

doi:10.1121/1.5111065

Cited by 14 publications

(10 citation statements)

References 21 publications

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“…2 . A comparison of the two upper panels shows that HI listeners had higher thresholds overall, consistent with previous studies using similar stimuli ( Best and Swaminathan, 2019 ; Baltzell et al , 2020 ). For NH listeners, thresholds were also higher for the Babble and Decor conditions (lower panels) than in Quiet, as expected.…”

Section: Resultssupporting

confidence: 89%

Binaural consequences of speech envelope enhancement

Baltzell

Cardosi

Swaminathan

et al. 2022

JASA Express Letters

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The potential binaural consequences of two envelope-based speech enhancement strategies (broadband compression and expansion) were examined. Sensitivity to interaural time differences imposed on four single-word stimuli was measured in listeners with normal hearing and sensorineural hearing loss. While there were no consistent effects of compression or expansion across all words, some potentially interesting word-specific effects were observed.

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Section: Resultssupporting

confidence: 89%

Binaural consequences of speech envelope enhancement

Baltzell

Cardosi

Swaminathan

et al. 2022

JASA Express Letters

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“…The current study found a factor of two increase in ILD discrimination thresholds between age groups and used pure tones (a single frequency); the other studies found smaller or no increases and used wider bandwidth noise or click stimuli. Other studies have noted improved ILD and ITD performance with increasing stimulus bandwidth (Hartmann and Constan, 2002 ; Best and Swaminathan, 2019 ). In addition, ILD discrimination thresholds are worse for steady-state stimuli (like the tones used in the present study) compared to modulated stimuli (like noises) (Laback et al, 2017 ; Rosen and Goupell, 2022 ).…”

Section: Discussionmentioning

confidence: 82%

Age-Related Changes in Interaural-Level-Difference-Based Across-Frequency Binaural Interference

Goupell

2022

Front. Aging Neurosci.

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Low-frequency interaural time differences and high-frequency interaural level differences (ILDs) are used to localize sounds in the horizontal plane. Older listeners appear to be worse at horizontal-plane sound localization to compared younger listeners, but little is understood about age-related changes to across-frequency binaural processing. This study investigated if the frequency dependence of across-frequency ILD processing is altered for older compared to younger listeners, which was done by using an across-frequency binaural interference task (when the interaural difference sensitivity for a target sound is decreased by a spectrally remote interfering sound with zero interaural differences). It was hypothesized that as listeners experience advancing age and age-related high-frequency hearing loss (i.e., presbycusis), they will demonstrate worse binaural performance and experience more across-channel binaural interference (because of age-related temporal processing deficits), and will increasingly be affected by interferers at lower frequencies (because of age-related hearing loss) when compared to younger listeners. There were 11 older (>65 yrs) and 20 younger (<30 yrs) listeners with normal to near-normal audiometric thresholds up to 2 kHz. They were tested using a left-right ILD lateralization discrimination task. Single-tone ILD discrimination thresholds and across-frequency binaural interference were measured at 0.5, 1, 2, 4, and 8 kHz. ILD thresholds and interference were about twice as large for older compared to younger listeners. Interferers ≤1 kHz produced 2–3 times as much across-frequency binaural interference for older compared to younger listeners. Hearing thresholds were significant predictors of single-tone ILD thresholds; in addition, both target and interferer hearing thresholds were significant predictors of binaural interference. The results suggest a reweighting of binaural information that occurs with advancing age and age-related high-frequency hearing loss. This evidence of plasticity may help explain some of the age-related changes in spatial-hearing abilities.

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“…It has been shown numerous times that listeners with sensorineural hearing loss have poorer ITD sensitivity on average relative to listeners with audiometrically normal hearing ( Best & Swaminathan, 2019 ; Hawkins & Wightman, 1980 ; King et al, 2014 ; Lacher-Fougère & Demany, 2005 ; Smoski & Trahiotis, 1986 ; Spencer et al, 2016 ). However, many details of this “ITD deficit” are still unclear, including whether it applies equally to ITDs carried in the fine structure and those carried in the envelope of complex sounds.…”

Section: Discussionmentioning

confidence: 99%

Effects of Hearing Loss on Interaural Time Difference Sensitivity at Low and High Frequencies

2022

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While many studies have reported a loss of sensitivity to interaural time differences (ITDs) carried in the fine structure of low-frequency signals for listeners with hearing loss, relatively few data are available on the perception of ITDs carried in the envelope of high-frequency signals in this population. The relevant studies found stronger effects of hearing loss at high frequencies than at low frequencies in most cases, but small subject numbers and several confounding effects prevented strong conclusions from being drawn. In the present study, we revisited this question while addressing some of the issues identified in previous studies. Participants were ten young adults with normal hearing (NH) and twenty adults with sensorineural hearing impairment (HI) spanning a range of ages. ITD discrimination thresholds were measured for octave-band-wide “rustle” stimuli centered at 500 Hz or 4000 Hz, which were presented at 20 or 40 dB sensation level. Broadband rustle stimuli and 500-Hz pure-tone stimuli were also tested. Thresholds were poorer on average for the HI group than the NH group. The ITD deficit, relative to the NH group, was similar at low and high frequencies for most HI participants. For a small number of participants, however, the deficit was strongly frequency-dependent. These results provide new insights into the binaural perception of complex sounds and may inform binaural models that incorporate effects of hearing loss.

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Revisiting the detection of interaural time differences in listeners with hearing loss

Cited by 14 publications

References 21 publications

Binaural consequences of speech envelope enhancement

Binaural consequences of speech envelope enhancement

Age-Related Changes in Interaural-Level-Difference-Based Across-Frequency Binaural Interference

Effects of Hearing Loss on Interaural Time Difference Sensitivity at Low and High Frequencies

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