Department of Neurosciences, Research Group ExpORL, KU Leuven, Leuven, Belgium.
Int J Audiol. 2021 Dec;60(12):946-963. doi: 10.1080/14992027.2021.1902579. Epub 2021 Apr 11.
This review article presents an overview of all Digit Triplet Tests (DTT) and digits-in-noise tests (DIN) and their variations in language, speech material, masking noise, test procedures, and targeted population. The effects on aspects of validity, reliability, and feasibility are investigated.
Scoping review.
All studies referring to the DTT and DIN were collected from Pubmed and Embase. Search terms "digit triplet test" and "digits in noise" were used. Citations of selected articles were scanned backwards in time (the bibliography of the already selected research article) and forward in time (articles that cited the already selected research article). The search terms yielded 95 results in total. Eventually, 39 papers were selected.
Analyses showed psychometric reference-curves with steep slopes and speech reception thresholds with high measurement precision which are strongly associated with pure tone audiometry. High sensitivity and specificity to detect elevated pure tone thresholds were noted for test variants. Certain procedural modifications of the DTT and DIN can further improve the test. Additionally, large-scale application of the DTT and DIN is feasible.
The DTT and DIN are a very valuable tool for screening and diagnostics for a wide variety of populations.
本文综述了所有数字三刺激测试（DTT）和数字噪声测试（DIN）及其在语言、语音材料、掩蔽噪声、测试程序和目标人群方面的变化。研究了这些变化对有效性、可靠性和可行性的影响。
范围综述。
从 Pubmed 和 Embase 收集了所有涉及 DTT 和 DIN 的研究。使用的检索词是“digit triplet test”和“digits in noise”。选择文章的参考文献被回溯（已选择研究文章的参考文献）和前瞻性（引用已选择研究文章的文章）扫描。检索词共产生了 95 个结果。最终，选择了 39 篇论文。
分析表明，心理测量参考曲线斜率陡峭，语音接受阈值测量精度高，与纯音测听密切相关。测试变体对检测纯音阈值升高具有较高的灵敏度和特异性。DTT 和 DIN 的某些程序修改可以进一步提高测试的效果。此外，DTT 和 DIN 的大规模应用是可行的。
DTT 和 DIN 是一种非常有价值的工具，可用于各种人群的筛查和诊断。
