Tags

Type your tag names separated by a space and hit enter

[Distortion product of otoacoustic emissions in normal hearing and sensorineural hearing loss].
HNO. 1995 Jan; 43(1):19-24.HNO

Abstract

Based on a variety of experimental and clinical studies the diagnostic significance of transient evoked otoacoustic emissions (TEOAEs) is well established. This is also due to the availability of commercial hardware and software which is optimized for the recording of click-evoked OAEs. In cases with distortion product otoacoustic emissions (DPOAEs) the significance for clinical purposes is not yet clear. This study presents results obtained in normal hearing subjects and patients with sensorineural hearing losses (214 ears). The study focuses on three problems: 1. Incidence of DPOAEs in different groups of hearing loss. 2. Level of DPOAEs at various frequencies in each group of hearing loss. 3. Frequency-specific relationships between hearing loss and DPOAEs. Recording of DPOAEs was performed with the ILO92 system and standard configuration (primary tone level, 70 dB SPL). In normal hearing ears DPOAEs were observed at all frequencies above 1 kHz. In cases with moderate hearing loss the detection rate decreased to about 80%. With further increases in hearing loss the detection rate and level of DPOAEs decreased. At frequencies below 1500 Hz even in normal hearing subjects, the level of DPOAEs only slightly exceeded the noise level. The upper limit of hearing loss for which DPOAEs could be observed depended on frequency. In the low-frequency range DPOAEs were absent in ears with a sensorineural hearing loss greater than 35-45 dB; at frequencies between 4 and 6 kHz DPOAEs were observed even in ears with a hearing loss 65 dB.(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors+Show Affiliations

HNO-Abteilung, Landeskrankenhaus St. Pölten.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

English Abstract
Journal Article

Language

ger

PubMed ID

7890546

Citation

Schlögel, H, et al. "[Distortion Product of Otoacoustic Emissions in Normal Hearing and Sensorineural Hearing Loss]." HNO, vol. 43, no. 1, 1995, pp. 19-24.
Schlögel H, Stephan K, Böheim K, et al. [Distortion product of otoacoustic emissions in normal hearing and sensorineural hearing loss]. HNO. 1995;43(1):19-24.
Schlögel, H., Stephan, K., Böheim, K., & Welzl-Müller, K. (1995). [Distortion product of otoacoustic emissions in normal hearing and sensorineural hearing loss]. HNO, 43(1), 19-24.
Schlögel H, et al. [Distortion Product of Otoacoustic Emissions in Normal Hearing and Sensorineural Hearing Loss]. HNO. 1995;43(1):19-24. PubMed PMID: 7890546.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Distortion product of otoacoustic emissions in normal hearing and sensorineural hearing loss]. AU - Schlögel,H, AU - Stephan,K, AU - Böheim,K, AU - Welzl-Müller,K, PY - 1995/1/1/pubmed PY - 1995/1/1/medline PY - 1995/1/1/entrez SP - 19 EP - 24 JF - HNO JO - HNO VL - 43 IS - 1 N2 - Based on a variety of experimental and clinical studies the diagnostic significance of transient evoked otoacoustic emissions (TEOAEs) is well established. This is also due to the availability of commercial hardware and software which is optimized for the recording of click-evoked OAEs. In cases with distortion product otoacoustic emissions (DPOAEs) the significance for clinical purposes is not yet clear. This study presents results obtained in normal hearing subjects and patients with sensorineural hearing losses (214 ears). The study focuses on three problems: 1. Incidence of DPOAEs in different groups of hearing loss. 2. Level of DPOAEs at various frequencies in each group of hearing loss. 3. Frequency-specific relationships between hearing loss and DPOAEs. Recording of DPOAEs was performed with the ILO92 system and standard configuration (primary tone level, 70 dB SPL). In normal hearing ears DPOAEs were observed at all frequencies above 1 kHz. In cases with moderate hearing loss the detection rate decreased to about 80%. With further increases in hearing loss the detection rate and level of DPOAEs decreased. At frequencies below 1500 Hz even in normal hearing subjects, the level of DPOAEs only slightly exceeded the noise level. The upper limit of hearing loss for which DPOAEs could be observed depended on frequency. In the low-frequency range DPOAEs were absent in ears with a sensorineural hearing loss greater than 35-45 dB; at frequencies between 4 and 6 kHz DPOAEs were observed even in ears with a hearing loss 65 dB.(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0017-6192 UR - https://www.unboundmedicine.com/medline/citation/7890546/[Distortion_product_of_otoacoustic_emissions_in_normal_hearing_and_sensorineural_hearing_loss]_ L2 - http://www.diseaseinfosearch.org/result/6504 DB - PRIME DP - Unbound Medicine ER -