A Preliminary Study to Investigate the Correlation Between Position-Specific Effect of Interphase Gap and Competing Acoustic Environments Speech Recognition in Cochlear Implant Receivers

GONG Meng-fang; HE Qian; ZHU Xiao-ting; SHENG Xiao-liang; KANG Shi-yu; LIU Ji-sheng; TAO Duo-duo

doi:10.3969/j.issn.1672-4933.2026.01.006

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A Preliminary Study to Investigate the Correlation Between Position-Specific Effect of Interphase Gap and Competing Acoustic Environments Speech Recognition in Cochlear Implant Receivers

The Application of Auditory Evoked Potentials in Cochlear Implantation | 更新时间：2026-07-30

- A Preliminary Study to Investigate the Correlation Between Position-Specific Effect of Interphase Gap and Competing Acoustic Environments Speech Recognition in Cochlear Implant Receivers
- Chinese Scientific Journal of Hearing and Speech Rehabilitation Vol. 24, Issue 1, Pages: 29-34(2026)
- 作者机构：
  
  1.苏州大学附属第一医院耳鼻咽喉科苏州 215000
  2.苏州大学苏州医学院苏州 215000
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.1672-4933.2026.01.006
  CLC： R764.04
- Received：30 August 2025，
  
  Online First：09 January 2026，
  
  Published：15 January 2026
- 稿件说明：
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宫梦芳,何倩,朱晓婷等.人工耳蜗植入者位置特异性相间间隙效应与竞争语境言语识别的相关性研究初探[J].中国听力语言康复科学杂志,2026,24(01):29-34.

GONG Meng-fang,HE Qian,ZHU Xiao-ting,et al.A Preliminary Study to Investigate the Correlation Between Position-Specific Effect of Interphase Gap and Competing Acoustic Environments Speech Recognition in Cochlear Implant Receivers[J].Chinese Scientific Journal of Hearing and Speech Rehabilitation,2026,24(01):29-34.
宫梦芳,何倩,朱晓婷等.人工耳蜗植入者位置特异性相间间隙效应与竞争语境言语识别的相关性研究初探[J].中国听力语言康复科学杂志,2026,24(01):29-34. DOI： 10.3969/j.issn.1672-4933.2026.01.006.

GONG Meng-fang,HE Qian,ZHU Xiao-ting,et al.A Preliminary Study to Investigate the Correlation Between Position-Specific Effect of Interphase Gap and Competing Acoustic Environments Speech Recognition in Cochlear Implant Receivers[J].Chinese Scientific Journal of Hearing and Speech Rehabilitation,2026,24(01):29-34. DOI： 10.3969/j.issn.1672-4933.2026.01.006.

摘要

目的

探讨人工耳蜗植入（CI）者外周听神经功能通过相间间隙（interphase gap effect，IPG）效应评估与竞争语境言语识别表现的相关性，分析不同耳蜗区域的神经功能贡献差异。

方法

纳入13例单侧Nurotron CS-20A （TM） CI者，年龄9～68岁，植入时间0.25～14年，植入电极长度均为22 mm。测量蜗顶至蜗底4个电极（E1：213 Hz， E7：945 Hz， E13：1920 Hz， E19：3992 Hz）在IPG为5 μs与30 μs的电诱发复合动作电位（electrically evoked compound action potential， ECAP），通过计算振幅增长函数（amplitude growth function， AGF）斜率，获得IPG效应。言语测试包括：（1）安静与稳态噪声（+5 dB SNR）下双音节词/短句识别正确率；（2）同性（男声）与异性（女声）竞争掩蔽下的闭集短句识别阈（threshold of masked speech recognition， TMR dB）。

结果

IPG效应存在个体间及电极间差异（E1：18%， E7：51%， E13：56%， E19：28%；引出率61.5%～84.6%）。E1（低频区）IPG效应与安静/噪声下双音节词识别率（

=0.555-0.723，

0.05）、噪声下句子识别率（

=0.589，

=0.034）呈正相关，与女声掩蔽识别阈呈负相关（

=-0.637，

=0.019）。

结论

IPG效应与言语识别表现存在明确的位置特异性关联，蜗顶区编码低频声信号的神经功能（E1）是噪声与竞争语境下言语感知的关键生物标志物。IPG效应可作为评估外周听神经健康的特异性指标。

Abstract

Objective

This study aimed to investigate the position-specific correlationbetween peripheral auditory nerve function (evaluated via the interphase gap effect

IPG effect) and speech recognition performance in competing acoustic environments among cochlear implant (CI) users

with a focus on the differential contributions of neural functions across cochlear regions.

Methods

Thirteen unilateral Nurotron CS-20A(TM) CI users (aged 9-68 years)

all with an implanted electrode length of 22 mm

were included

and the slopes of the amplitude growth functions (AGF) of the electrically evoked compound action potential (ECAP) were measured at four electrodes from the cochlea apex to the cochlea floor (E1:213 Hz

E7:945 Hz

E13:1920 Hz

and E19:3992 Hz) in the IPG = 5 μs versus 30 μs condition

and the electrode-specific IPG was calculated. Speech tests included correct bisyllabic word/phrase recognition in quiet vs. steady state noise (+5dB SNR)

and closed-set phrase recognition threshold (TMR) under competing masking of same-sex (male) vs. opposite-sex (female) voices.

Results

There were inter-individual and inter-electrode differences in the IPG effect (E1:18%

E7:51%

E13:56%

E19:28%; elicitation rates 61.5%-84.6%).The IPG effect in the E1 (low-frequency region) was positively correlated with disyllabic word recognition rate in quiet/noise (

=0.555-0.723

0.05)

and sentence recognition rate in noise (

=0.589

=0.034)

and negatively correlated with female voice masking recognition threshold (

=-0.637

=0.019).

Conclusion

There is a clear location-specific association between the IPG effect and speech recognition performance

and low-frequency neural function in the cochleo-parietal region (E1) is a key biomarker of speech perception in noisy and competing contexts.The IPG effect can be used as a specific indicator for assessing the health of peripheral nerves.

关键词

Keywords

references

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