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Titolo:
Speech recognition in background noise: Monaural versus binaural listeningconditions in normal-hearing patients
Autore:
Persson, P; Harder, H; Arlinger, S; Magnuson, B;
Indirizzi:
Univ Hosp, Dept Otorhinolaryngol, SE-58185 Linkoping, Sweden Univ Hosp Linkoping Sweden SE-58185 laryngol, SE-58185 Linkoping, Sweden Univ Hosp, Dept Tech Audiol, SE-58185 Linkoping, Sweden Univ Hosp Linkoping Sweden SE-58185 h Audiol, SE-58185 Linkoping, Sweden
Titolo Testata:
OTOLOGY & NEUROTOLOGY
fascicolo: 5, volume: 22, anno: 2001,
pagine: 625 - 630
SICI:
1531-7129(200109)22:5<625:SRIBNM>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
FOLLOW-CONVERSATION; ABILITY; AIDS;
Keywords:
binaural hearing; ear surgery; free field; speech in noise; speech recognition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Persson, P Univ Hosp, Dept Otorhinolaryngol, SE-58185 Linkoping, Sweden Univ Hosp Linkoping Sweden SE-58185 E-58185 Linkoping, Sweden
Citazione:
P. Persson et al., "Speech recognition in background noise: Monaural versus binaural listeningconditions in normal-hearing patients", OTOL NEURO, 22(5), 2001, pp. 625-630

Abstract

Hypothesis: Patients with unilateral conductive hearing impairment often experience a great advantage in improved hearing thresholds after reconstructive car surgery because the binaural hearing leads to increased speech recognition in competing noise, The aim of this study was to develop a clinical audiometric test to quantify the ability of speech recognition in background noise preoperatively and postoperatively. Methods: A model consisting of phonetically balanced (PB) monosyllabic words and/or a just-follow-conversation test (JFC) was used in 16 normal-hearing listeners. In 8 of the participants, JFC at two levels of background noise (60 and 40 dB sound pressure level) was used as the only method. The tasks were performed in an anechoic chamber with varying spatial separations of speech and noise sources under free field conditions. The tests were madebinaurally and monaurally; the latter condition was achieved by occluding one ear with a hearing protector. In PB word tests, the percent of correctly repeated words was scored. In the JFC task, the speech signal was adjusted by the listener to a level where he, or she could just understand what was being said. This was expressed as a signal-to-noise (S/N) ratio. Results: In both types of tests, the subjects achieved significantly better speech recognition scores in the binaural situations. In summary, compared with monaural conditions, the subjects achieved 17% to 18% better speech recognition in PB tests, and in JFC tests a 2- to 3-dB lower S/N ratio in binaural conditions. Conclusion: These free field tests can be developed further as a clinical tool preoperatively and postoperatively to evaluate the effect of binaural hearing after ear surgery.

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Documento generato il 28/02/20 alle ore 20:23:01