Kwak Chanbeom, Seo Jae-Hyun, Oh Yonghee, Han Woojae
Division of Speech Pathology and Audiology, College of Natural Sciences, Hallym University, Chuncheon, Korea.
Laboratory of Hearing and Technology, Research Institute of Audiology and Speech Pathology, College of Natural Sciences, Hallym University, Chuncheon, Korea.
J Audiol Otol. 2022 Jan;26(1):10-21. doi: 10.7874/jao.2021.00416. Epub 2021 Nov 16.
Although the digit-in-noise (DIN) test is simple and quick, little is known about its key factors. This study explored the considerable components of the DIN test through a systematic review and meta-analysis.
After six electronic journal databases were screened, 14 studies were selected. For the meta-analysis, standardized mean difference was used to calculate effect sizes and 95% confidence intervals.
The overall result of the meta-analysis showed an effect size of 2.224. In a subgroup analysis, the patient's hearing status was found to have the highest effect size, meaning that the DIN test was significantly sensitive to screen for hearing loss. In terms of the length of the presenting digits, triple digits had lower speech recognition thresholds (SRTs) than single or pairs of digits. Among the types of background noise, speech-spectrum noise provided lower SRTs than multi-talker babbling. Regarding language variance, the DIN test showed better performance in the patient's native language(s) than in other languages.
When uniformly developed and well validated, the DIN test can be a universal tool for hearing screening.
尽管数字噪声测试（DIN）简单快捷，但对其关键因素却知之甚少。本研究通过系统评价和荟萃分析探讨了DIN测试的重要组成部分。
在筛选了六个电子期刊数据库后，选取了14项研究。对于荟萃分析，采用标准化均值差来计算效应量和95%置信区间。
荟萃分析的总体结果显示效应量为2.224。在亚组分析中，发现患者的听力状况效应量最高，这意味着DIN测试在筛查听力损失方面具有显著的敏感性。就呈现数字的长度而言，三位数的言语识别阈值（SRT）低于一位数或两位数。在背景噪声类型中，言语频谱噪声的SRT低于多人交谈的嘈杂声。关于语言差异，DIN测试在患者的母语中比在其他语言中表现更好。
当统一开发并经过充分验证时，DIN测试可以成为听力筛查的通用工具。
