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Titolo:
Frequency-specific information from click evoked otoacoustic emissions in noise-induced hearing loss
Autore:
Tognola, G; Grandori, F; Avan, P; Ravazzani, P; Bonfils, P;
Indirizzi:
Politecn Milan, Dept Biomed Engn, I-20133 Milan, Italy Politecn Milan Milan Italy I-20133 ept Biomed Engn, I-20133 Milan, Italy Politecn Milan, CNR, Ctr Biomed Engn, I-20133 Milan, Italy Politecn MilanMilan Italy I-20133 Ctr Biomed Engn, I-20133 Milan, Italy Sch Med, Lab Sensory Biophys, Clermont Ferrand, France Sch Med Clermont Ferrand France nsory Biophys, Clermont Ferrand, France Hosp Boucicaut, CNRS, UPRESA, Paris, France Hosp Boucicaut Paris FranceHosp Boucicaut, CNRS, UPRESA, Paris, France Hosp Boucicaut, ENT Dept, Paris, France Hosp Boucicaut Paris FranceHosp Boucicaut, ENT Dept, Paris, France
Titolo Testata:
AUDIOLOGY
fascicolo: 5, volume: 38, anno: 1999,
pagine: 243 - 250
SICI:
0020-6091(199909/10)38:5<243:FIFCEO>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
STIMULATED ACOUSTIC EMISSIONS; PURE-TONE; COCHLEAR FUNCTION; WAVELET ANALYSIS; AUDITORY-SYSTEM; IMPAIRED EARS; AUDIOGRAM;
Keywords:
click evoked otoacoustic emissions (CEOAE); sensorineural hearing loss; narrow band components; wavelet transform;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Tognola, G Politecn Milan, Dept Biomed Engn, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy Politecn Milan Piazza Leonardo da Vinci 32 Milan Italy I-20133
Citazione:
G. Tognola et al., "Frequency-specific information from click evoked otoacoustic emissions in noise-induced hearing loss", AUDIOLOGY, 38(5), 1999, pp. 243-250

Abstract

Click evoked otoacoustic emissions (CEOAEs), purl-tone audiograms (PTAs), and Bekesy sweep frequency audiograms were recorded from 15 ears of 11 subjects with noise-induced hearing loss. For all ears, hearing threshold levels greater than or equal to 30 dB HL were found at the high frequencies. Theaims of the study were to examine whether the decomposition of CEOAEs intonarrow band components could identify hearing loss in a frequency-specificmanner and to what extent audiometric thresholds could be predicted. CEOAEs were parcelled into 0.5-kHz-wide components by means of the wavelet transform. Reproducibility of CEOAE components was compared with audiometric threshold at corresponding frequencies. A general trend of low reproducibilityfor increasing audiometric thresholds was found. A reproducibility value of 60 per cent was found to best separate normal and elevated thresholds. The presence of a CEOAE component at a given frequency was always associated with audiometric thresholds less than or equal to 20-25 dB HL. On the otherhand, the absence of a component was equally associated either with normalor abnormal hearing levels. Large inter-subject variability was observed. A weak linear relationship was found between reproducibility and audiometric thresholds at corresponding frequencies, indicating that analysis of narrow band CEOAE components is valuable for separating normal from hearing-impaired ears but cannot replace the audiogram.

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Documento generato il 30/11/20 alle ore 10:06:10