Speech discrimination and binaural processing in bilateral symmetric vs. asymmetric sensorineural hearing loss

IF 1.1 Q3 OTORHINOLARYNGOLOGY

Acta otorrinolaringologica espanola Pub Date : 2025-09-01 DOI:10.1016/j.otorri.2025.512265

Mai El Ghazaly, Esraa Meckawy, Hesham Kozou, Doaa Elmoazen

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Abstract

Purpose

To investigate the effects of symmetric and asymmetric sensorineural hearing loss (SSNHL and ASNHL) on speech discrimination abilities and binaural processing, including integration and interaction.

Materials and methods

This cross-sectional study included 36 adult patients with bilateral sensorineural hearing loss, divided into two groups based on the symmetry of their hearing loss: ASNHL and SSNHL. Speech discrimination abilities were evaluated using the maximum speech discrimination score (SDSmax) with Arabic monosyllabic words. Binaural integration was assessed using the free-recall double dichotic digit test (DDT), while binaural interaction was evaluated through the binaural fusion test (BFT).

Results

The SDSmax of the worse-hearing ear in ASNHL patients (48.89 ± 10.13%) was significantly lower than in SSNHL patients (69.33 ± 7.97%) with comparable degrees of hearing loss. ASNHL patients exhibited a greater disparity between the better and worse-hearing ears in DDT scores (53.15 ± 13.98%) compared to SSNHL patients (22.96 ± 5.93%). Additionally, the BFT scores in ASNHL patients (55.14 ± 13.30%) were significantly lower than in SSNHL patients (72.92 ± 12.55%).

Conclusions

ASNHL patients experience greater impairments in speech discrimination, binaural integration, and interaction compared to SSNHL patients. These differences likely stem from auditory deprivation and asymmetry-induced deficits. Developing tailored hearing rehabilitation strategies is critical to addressing the unique challenges posed by asymmetric hearing loss.

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双侧对称型与非对称型感音神经性听力损失的言语辨别与双耳加工

目的探讨对称型和非对称型感音神经性听力损失（SSNHL和ASNHL）对言语辨别能力和双耳加工（包括整合和交互）的影响。材料与方法横断面研究36例成年双侧感音神经性听力损失患者，根据听力损失的对称性分为ASNHL组和SSNHL组。用阿拉伯语单音节词的最大言语辨别分数（SDSmax）评价言语辨别能力。采用自由回忆双双指测试（DDT）评估双耳整合，通过双耳融合测试（BFT）评估双耳相互作用。结果听力损失程度相当的ASNHL患者听力差耳SDSmax（48.89±10.13%）明显低于听力损失程度相当的SSNHL患者（69.33±7.97%）。ASNHL患者的滴滴涕评分（53.15±13.98%）比SSNHL患者（22.96±5.93%）差异更大。ASNHL患者BFT评分（55.14±13.30%）明显低于SSNHL患者（72.92±12.55%）。结论与SSNHL患者相比，SSNHL患者在言语识别、双耳整合和互动方面存在更大的障碍。这些差异可能源于听觉剥夺和不对称引起的缺陷。制定量身定制的听力康复策略对于解决不对称听力损失带来的独特挑战至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta otorrinolaringologica espanola OTORHINOLARYNGOLOGY-

CiteScore

1.40

自引率

20.00%

发文量

审稿时长

44 days

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