Document Detail

Otoacoustic emissions recorded at rapid stimulus rates.
MedLine Citation:
PMID:  8224573     Owner:  NLM     Status:  MEDLINE    
Otoacoustic emissions were evoked by clicks presented according to maximum length sequences. The analysis disentangled the overlapping responses that occur when stimuli are presented at intervals shorter than the duration of the response. Two types of sequence were used: a "monopolar" sequence in which clicks were present or absent, and a "bipolar" sequence in which both condensation and rarefaction clicks occurred. Emissions can be recorded at stimulus rates of up to 1000/sec although the amplitude of the response decreases at these rapid rates. This decrease in amplitude requires a compensatory increase in the number of stimuli to maintain the same signal-to-noise ratio. Optimal efficiency can be attained at rates between 200 and 500/sec. At these rates the emissions can be recorded in about one half the time required for conventional averaging at regular rates of 50/sec.
T W Picton; A J Kellett; M Vezsenyi; D E Rabinovitch
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ear and hearing     Volume:  14     ISSN:  0196-0202     ISO Abbreviation:  Ear Hear     Publication Date:  1993 Oct 
Date Detail:
Created Date:  1993-12-03     Completed Date:  1993-12-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8005585     Medline TA:  Ear Hear     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  299-314     Citation Subset:  IM    
Human Neuroscience Research Unit, University of Ottawa, Ontario, Canada.
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MeSH Terms
Acoustic Stimulation
Ear / physiology*
Evoked Potentials, Auditory / physiology
Middle Aged
Otoacoustic Emissions, Spontaneous / physiology*
Signal Processing, Computer-Assisted

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