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Titolo:
Effects of varying unilateral conductive hearing losses on speech-in-noisediscrimination: An experimental study with implications for surgical correction
Autore:
Nia, J; Bance, M;
Indirizzi:
QEII Hlth Sci Ctr, Halifax, NS B3H 2Y9, Canada QEII Hlth Sci Ctr Halifax NS Canada B3H 2Y9 , Halifax, NS B3H 2Y9, Canada Dalhousie Univ, Div Otolaryngol, Halifax, NS B3H 2Y9, Canada Dalhousie Univ Halifax NS Canada B3H 2Y9 gol, Halifax, NS B3H 2Y9, Canada Univ Toronto, Sch Med, Toronto, ON, Canada Univ Toronto Toronto ON Canada niv Toronto, Sch Med, Toronto, ON, Canada
Titolo Testata:
OTOLOGY & NEUROTOLOGY
fascicolo: 6, volume: 22, anno: 2001,
pagine: 737 - 744
SICI:
1531-7129(200111)22:6<737:EOVUCH>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
MIDDLE-EAR SURGERY; COMPRESSION SYSTEM; WORD RECOGNITION; INTELLIGIBILITY; BENEFIT; QUIET;
Keywords:
ear surgery; speech-in-noise; unilateral hearing loss;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Bance, M QEII Hlth Sci Ctr, Victoria Gen Site,Dickson Bldg,Rm 3184,1278 Tower, Halifax, NS B3H 2Y9, Canada QEII Hlth Sci Ctr Victoria Gen Site,Dickson Bldg,Rm 3184,1278 Tower Halifax NS Canada B3H 2Y9
Citazione:
J. Nia e M. Bance, "Effects of varying unilateral conductive hearing losses on speech-in-noisediscrimination: An experimental study with implications for surgical correction", OTOL NEURO, 22(6), 2001, pp. 737-744

Abstract

Hypothesis: Unilateral conductive hearing loss (HL) causes measurable disability in realistic hearing environments. The benefits of improving this loss depend both on the, absolute level of final hearing and on hearing asymmetry. Background: Surgical success is often measured by the degree of change in the air-bone gap or in the air thresholds. The Glasgow Benefit Plot and theBelfast Rule of Thumb suggest that a given hearing gain will be of greaterbenefit if the postoperative thresholds in the worse ear are a < 30-dB HL or within 15 dB of the contralateral ear. This assertion has important surgical implications, but few audiometric data supporting it currently exist. Methods: Speech-in-noise sound-field scores were measured in 16 normal volunteers at three presentation levels at two signal-to-noise ratios (SNRs). Two levels of unilateral conduclive HL were simulated with earplugs, averaging 25- and 43-dB HL, respectively, and the effect on speech-in-noise scores was measured and analyzed. Results: Unilateral conductive HL is a disadvantage at lower sound intensities and low SNRs, but it can be compensated for by increasing volume or SNR. The benefits of improving unilateral conductive HL are greater if the final asymmetry is < 25 dB and the final hearing threshold is < 25 dB. Conclusions: Unilateral conductive HL is a significant disadvantage at lowSNRs or presentation volumes. The benefits of surgery to improve HL dependnot only on the degree of hearing improvement but also on the final hearing threshold in both ears.

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Documento generato il 25/02/20 alle ore 10:27:05