Widex Office of Research in Clinical Amplification (ORCA-USA), Lisle, IL, USA.
Int J Audiol. 2021 Jan;60(1):35-43. doi: 10.1080/14992027.2020.1807626. Epub 2020 Aug 21.
This study measured the performance of normal-hearing listeners on the Repeat-Recall Test (RRT) in two noise types (2-talker babble [2TBN] and continuous speech-shaped noise [SSN]) by two noise azimuths (0° and 180°) configurations at signal-to-noise ratios (SNRs) of 0, 5, 10, and 15 dB and quiet.
Within-subject repeated measures.
Twenty-one listeners with normal hearing who also passed cognitive screening were tested in the sound-field with the speech stimulus presented from 0° at 75 dB SPL in 4 noise configurations. The order of SNRs, noise configurations, and RRT topic conditions was counterbalanced across listeners.
Analysis revealed that repeat scores were significantly better for 2TBN, for noise at 180°, and for high context (HC) sentences. Recall performance was significantly better for SSN and HC sentences. Listening effort ratings were higher for SSN and for noise front condition at SNR ≤ 10 dB. The 2TBN noise was tolerated longer than SSN. Performance on all measures improved with SNRs.
These data showed performance differences among noise configurations and provided a preliminary basis for comparison with hearing-impaired listeners' performance on the RRT.
本研究通过两种噪声方位（0°和 180°）配置，在信号噪声比（SNR）为 0、5、10 和 15dB 以及安静环境下，测量正常听力受试者在重复回忆测试（RRT）中的表现，测试噪声类型为双说话人背景噪声（2TBN）和连续语音噪声（SSN）。
受试者内重复测量。
21 名听力正常且通过认知筛查的受试者在声场中进行测试，语音刺激在 4 种噪声配置下从 0°以 75dB SPL 呈现。SNR、噪声配置和 RRT 主题条件的顺序在受试者之间平衡。
分析显示，2TBN、180°噪声和高语境（HC）句子的重复得分显著更好，SSN 和 HC 句子的回忆成绩显著更好。在 SNR≤10dB 时，SSN 和噪声前条件的听力努力评级更高。2TBN 噪声的可容忍度高于 SSN。所有测量指标的性能均随 SNR 提高而改善。
这些数据显示了噪声配置之间的性能差异，并为与听力受损受试者在 RRT 上的表现进行初步比较提供了基础。
