Document Detail


Effects of high-pass filtering on the detection of the auditory brainstem response.
MedLine Citation:
PMID:  6487849     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of high-pass filtering on the slow components of the click-evoked auditory brainstem response (ABR) have been assessed in eight normally hearing adults. Eight high-pass Butterworth-type filters (36 dB/octave) were investigated with cut-off frequencies at 10, 20, 30, 40, 50, 60, 80 and 100 Hz (-3 dB points). The low-pass filter was kept constant at 1 kHz. A 20 dB nHL stimulus was presented to the subjects at a rate of 26/s. Two averaged ABR waveforms, each consisting of 2048 individual sweeps, were recorded for each filter setting with a post-stimulus sweep time of 19.2 ms. In the visual interpretation of the recordings the correlation between each waveform, and the amplitude of the response relative to the noise, strongly affects the decision as to whether a response is present. A mathematical analysis of these parameters, using a scanning correlation window technique, showed that a 20 Hz filter is optimum for the best detection of the ABR close to hearing threshold.
Authors:
S M Mason
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  British journal of audiology     Volume:  18     ISSN:  0300-5364     ISO Abbreviation:  Br J Audiol     Publication Date:  1984 Aug 
Date Detail:
Created Date:  1984-12-19     Completed Date:  1984-12-19     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0357321     Medline TA:  Br J Audiol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  155-61     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Audiometry / methods*
Audiometry, Evoked Response / methods*
Auditory Threshold / physiology
Brain Stem / physiology*
Evoked Potentials, Auditory
Humans
Pitch Perception / physiology
Reference Values

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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