Baljic, I. and Walger, M. (2019). Objective frequency-specific measurement of hearing threshold using narrow-band chirp stimuli with level-adaptive simultaneous masking. HNO, 67 (11). S. 843 - 855. NEW YORK: SPRINGER. ISSN 1433-0458

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Abstract

Background In the past, various simulation and measurement paradigms have been introduced and evaluated in order to improve frequency-specific measurement of the hearing threshold using early auditory evoked potentials (EAEP). A promising approach for improvement of detection of stimulus response is the usage of frequency-modulated chirp signals, which optimize the temporal synchrony of neuronal responses along a region of the basilar membrane. Aim of the study This study validated the performance of three generated narrow-band chirp stimuli in combination with a level-adaptive simultaneous masker on a collective of normally hearing subjects. Material and methods In this study 25 normal hearing subjects took part after undergoing pure tone audiometry as well as an objective estimation of the auditory threshold using low, middle and high chirp stimuli. The characteristic EAEP parameters were visually identified before statistical analysis. The characteristic latency level function was conducted using measurements within a stimulus level range from 80 to 0dB HL. Afterwards a comparison of objectively verified auditory threshold and subjective auditory threshold was conducted. Results All objectively determined thresholds of the frequency-specific evoked EAEP were on average below 10dB HL: low chirp at 8.2dB HL, middle chirp at 5.8dB HL and high chirp at 5.4dB HL. The mean difference compared to subjectively determined auditory thresholds at all frequencies was below 3dB and was not significant. Conclusion Brainstem evoked response audiometry (BERA) using a band-limited and level-specific masked chirp stimulus is an efficient method for the determination of frequency-specific excitation thresholds in the clinical routine. The small, insignificant difference compared to the subjectively determined auditory thresholds makes usage of correction factors mostly redundant. Confirming the study results concerning low chirp stimuli so far, the low chirp BERA currently seems to be the method of choice for estimation of auditory threshold at low frequency ranges around 500Hz.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Baljic, I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Walger, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-129489
DOI: 10.1007/s00106-019-0676-9
Journal or Publication Title: HNO
Volume: 67
Number: 11
Page Range: S. 843 - 855
Date: 2019
Publisher: SPRINGER
Place of Publication: NEW YORK
ISSN: 1433-0458
Language: German
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
STEADY-STATE RESPONSES; BRAIN-STEM RESPONSES; HIGH-PASS; NOISE; SYNCHRONY; ASSRMultiple languages
OtorhinolaryngologyMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/12948

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