Azimuthal sound source localization of various sound stimuli under different conditions

被引:5
|
作者
Risoud, M. [1 ,2 ]
Hanson, J-N [1 ]
Gauvrit, F. [1 ]
Renard, C. [1 ]
Bonne, N-X [1 ,3 ]
Vincent, C. [1 ,2 ]
机构
[1] CHU Lille, Dept Otol & Neurotol, F-59000 Lille, France
[2] Univ Lille, CHU Lille, Inserm U1008, Controlled Drug Delivery Syst & Biom, F-59000 Lille, France
[3] Univ Lille, CHU Lille, Inserm U1192, Prote Inflammatory Response Mass Spectrometry PRI, F-59000 Lille, France
关键词
Sound-source localization; Unilateral hearing loss; Interaural time difference; Interaural level difference; HORIZONTAL-PLANE LOCALIZATION; NORMAL-HEARING LISTENERS; SPEECH; ADULTS; PERFORMANCE; NOISE; ROOMS;
D O I
10.1016/j.anorl.2019.09.007
中图分类号
R76 [耳鼻咽喉科学];
学科分类号
100213 ;
摘要
Aim: To evaluate azimuthal sound-source localization performance under different conditions, with a view to optimizing a routine sound localization protocol. Material and method: Two groups of healthy, normal-hearing subjects were tested identically, except that one had to keep their head still while the other was allowed to turn it. Sound localization was tested without and then with a right ear plug (acute auditory asymmetry) for each of the following sound stimuli: pulsed narrow-band centered on 250 Hz, continuous narrowband centered on 2000 Hz, 4000 Hz and 8000 Hz, continuous 4000 Hz warble, pulsed white noise, and word ("lac" (lake)). Root mean square error was used to calculate sound-source localization accuracy. Results: With fixed head, localization was significantly disturbed by the earplug for all stimuli (P< 0.05). The most discriminating stimulus was continuous 4000 Hz narrow-band: area under the ROC curve (AUC), 0.99 [95% CI, 0.95-1.01] for screening and 0.85 [0.82-0.89] for diagnosis. With mobile head, localization was significantly better than with fixed head for 4000 and 8000 Hz stimuli (P< 0.05). The most discriminating stimulus was continuous 2000 Hz narrow-band: AUC, 0.90 [0.83-0.97] for screening and 0.75 [0.71-0.79] for diagnosis. In both conditions, pulsed noise (250 Hz narrow-band, white noise or word) was less difficult to localize than continuous noise. Conclusion: The test was more sensitive with the head immobile. Continuous narrow-band stimulation centered on 4000 Hz most effectively explored interaural level difference. Pulsed narrow-band stimulation centered on 250 Hz most effectively explored interaural time difference. Testing with mobile head, closer to real-life conditions, was most effective with continuous narrow-band stimulation centered on 2000 Hz. (C) 2019 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码:21 / 29
页数:9
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