Cochlear Tuning in Early Aging Estimated with Three Methods.

IF 3 2区 医学 Q1 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY
Trends in Hearing Pub Date : 2025-01-01 Epub Date: 2025-07-29 DOI:10.1177/23312165251364675
Courtney Coburn Glavin, Sumitrajit Dhar
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Abstract

Age-related hearing loss (ARHL) currently affects over 20 million adults in the U.S. and its prevalence is expected to increase as the population ages. However, little is known about the earliest manifestations of ARHL, including its influence on auditory function beyond the threshold of sensation. This work explores the effects of early aging on frequency selectivity (i.e., "tuning"), a critical feature of normal hearing function. Tuning is estimated using both behavioral and physiological measures-fast psychophysical tuning curves (fPTC), distortion product otoacoustic emission level ratio functions (DPOAE LRFs), and stimulus-frequency OAE (SFOAE) phase gradient delay. All three measures were selected because they have high potential for clinical translation but have not been compared directly in the same sample of ears. Results indicate that there may be subtle changes in tuning during early aging, even in ears with clinically normal audiometric thresholds. Additionally, there are notable differences in tuning estimates derived from the three measures. Psychophysical tuning estimates are highly variable and statistically significantly different from OAE-derived tuning estimates, suggesting that behavioral tuning is uniquely influenced by factors not affecting OAE-based tuning. Across all measures, there is considerable individual variability that warrants future investigation. Collectively, this work suggests that age-related auditory decline begins in relatively young ears (<60 years) and in the absence of traditionally defined "hearing loss." These findings suggest the potential benefit of characterizing ARHL beyond threshold and establishing a gold standard for measuring frequency selectivity in humans.

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用三种方法估计早期衰老的耳蜗调谐。
年龄相关性听力损失(ARHL)目前影响着美国超过2000万成年人,随着人口老龄化,其患病率预计会增加。然而,对ARHL的早期表现知之甚少,包括其对感觉阈值以外听觉功能的影响。这项工作探讨了早期衰老对频率选择性(即“调谐”)的影响,这是正常听力功能的一个关键特征。通过行为和生理测量-快速心理物理调谐曲线(fPTC),失真积耳声发射电平比函数(DPOAE lrf)和刺激频率声发射(SFOAE)相位梯度延迟来估计调谐。选择这三种测量方法是因为它们具有很高的临床转化潜力,但尚未在同一耳朵样本中直接进行比较。结果表明,在早期衰老过程中,即使在临床上听力阈值正常的耳朵中,也可能存在细微的调谐变化。此外,从这三种度量中得出的调优估计存在显著差异。心理物理调谐估计是高度可变的,并且在统计上与基于oae的调谐估计有显著差异,这表明行为调谐仅受不影响基于oae的调谐的因素的影响。在所有的测量中,有相当大的个体差异,值得未来的调查。总的来说,这项研究表明,与年龄相关的听力衰退始于相对年轻的耳朵(
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来源期刊
Trends in Hearing
Trends in Hearing AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGYOTORH-OTORHINOLARYNGOLOGY
CiteScore
4.50
自引率
11.10%
发文量
44
审稿时长
12 weeks
期刊介绍: Trends in Hearing is an open access journal completely dedicated to publishing original research and reviews focusing on human hearing, hearing loss, hearing aids, auditory implants, and aural rehabilitation. Under its former name, Trends in Amplification, the journal established itself as a forum for concise explorations of all areas of translational hearing research by leaders in the field. Trends in Hearing has now expanded its focus to include original research articles, with the goal of becoming the premier venue for research related to human hearing and hearing loss.
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