Svenja Buth, Izet Baljić, Alexander Mewes, Matthias Hey
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The investigations of sound localization were conducted in a semicircle and fullcircle setup (7 and 12 equidistant loudspeakers).</p><p><strong>Results: </strong>SRT (S<sub>-45</sub>N<sub>45</sub>: -14.1 dB SNR; S<sub>45</sub>N<sub>-45</sub>: -16.4 dB SNR; S<sub>0</sub>N<sub>90</sub>: -13.1 dB SNR; S<sub>0</sub>N<sub>-90</sub>: -13.4 dB SNR) and test-retest reliability (4 to 6 dB SNR) were collected for speech intelligibility in noise with separated signals. The procedural learning effect for this setup could only be mitigated with 120 training sentences. Significantly smaller SRT values, resulting in better speech discrimination, were found for the test situation of the right compared to the left ear. RMS values could be gathered for sound localization in the semicircle (1,9°) as well as in the fullcircle setup (11,1°). 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引用次数: 0
摘要
背景：双耳听力能让人在嘈杂环境中更好地理解语音，也是声学空间定位的必要条件。本研究调查了噪声中信号源分离的语音辨别能力，并对声音定位进行了测量。目的是研究两种选定测量技术的特点和可重复性，这两种技术似乎适合描述双耳听力的上述方面：通过奥登堡句子测试，对 55 名听力正常的成年人进行了噪声中的言语接收阈值（SRT）和测试-再测试可靠性的收集，扬声器的空间设置角度为± 45°和± 90°。声音定位的调查在半圆和全圆设置（7 个和 12 个等距扬声器）中进行：结果：通过分离信号收集了噪声中语音清晰度的 SRT（S-45N45：-14.1 dB SNR；S45N-45：-16.4 dB SNR；S0N90：-13.1 dB SNR；S0N-90：-13.4 dB SNR）和测试重复可靠性（4 至 6 dB SNR）。这种设置的程序学习效应只能通过 120 个训练句子来缓解。与左耳相比，右耳的 SRT 值明显较小，因此语音辨别能力更强。在半圆形（1.9°）和全圆形（11.1°）设置下，均方根值可用于声音定位。全圆设置的复测结果更好：结论：在噪声中使用空间分离信号进行奥尔登堡句子测试时，必须进行 120 个句子的训练，以尽量减少程序学习效应。在信号源分离的噪声中进行语音辨别时，需要使用特定耳朵的 SRT 值，这可能是由于右耳的优势。建议在全圆设置中进行声音定位训练。
[Speech discrimination with separated signal sources and sound localization with speech stimuli : Learning effects and reproducibility].
Background: Binaural hearing enables better speech comprehension in noisy environments and is necessary for acoustic spatial orientation. This study investigates speech discrimination in noise with separated signal sources and measures sound localization. The aim was to study characteristics and reproducibility of two selected measurement techniques which seem to be suitable for description of the aforementioned aspects of binaural hearing.
Materials and methods: Speech reception thresholds (SRT) in noise and test-retest reliability were collected from 55 normal-hearing adults for a spatial setup of loudspeakers with angles of ± 45° and ± 90° using the Oldenburg sentence test. The investigations of sound localization were conducted in a semicircle and fullcircle setup (7 and 12 equidistant loudspeakers).
Results: SRT (S-45N45: -14.1 dB SNR; S45N-45: -16.4 dB SNR; S0N90: -13.1 dB SNR; S0N-90: -13.4 dB SNR) and test-retest reliability (4 to 6 dB SNR) were collected for speech intelligibility in noise with separated signals. The procedural learning effect for this setup could only be mitigated with 120 training sentences. Significantly smaller SRT values, resulting in better speech discrimination, were found for the test situation of the right compared to the left ear. RMS values could be gathered for sound localization in the semicircle (1,9°) as well as in the fullcircle setup (11,1°). Better results were obtained in the retest of the fullcircle setup.
Conclusion: When using the Oldenburg sentence test in noise with spatially separated signals, it is mandatory to perform a training session of 120 sentences in order to minimize the procedural learning effect. Ear-specific SRT values for speech discrimination in noise with separated signal sources are required, which is probably due to the right-ear advantage. A training is recommended for sound localization in the fullcircle setup.
期刊介绍：
HNO is an internationally recognized journal and addresses all ENT specialists in practices and clinics dealing with all aspects of ENT medicine, e.g. prevention, diagnostic methods, complication management, modern therapy strategies and surgical procedures.
Review articles provide an overview on selected topics and offer the reader a summary of current findings from all fields of ENT medicine.
Freely submitted original papers allow the presentation of important clinical studies and serve the scientific exchange.
Case reports feature interesting cases and aim at optimizing diagnostic and therapeutic strategies.
Review articles under the rubric ''Continuing Medical Education'' present verified results of scientific research and their integration into daily practice.
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