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DPOAEDistortion Product Otoacoustic Emissions (Audiology)
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DPOAE and AABR with at least 1 outer- or middle-ear measure 54% DPOAE and AABR with no outer- or middle-ear measures 21% DPOAE or AABR 21% Only outer- or middle-ear measures 4% Note: Table made from pie graph.
The DPOAE may be obtained in different ways 7-9: DP Gram which shows the range of the emissions in several frequencies in a previously determined sound level; DP Growth Rate also known as DPOAE I/O (input/output) in which the responses are analyzed in a particular frequency in decreasing sound levels in order to find the threshold of the response to the presented stimulus and provide information on cochlear non- linearity.
Although our patients did not show any significant differences in their routine auditory tests such as behavioral auditory, impedance audiometry, and DPOAE tests and also had normal neurological examinations findings, there were statistically significant differences considering the amplitudes of waves I, III, and V between the 2 groups.
This was evident by a significant decrease in DPOAE.
The PCB-associated decrease in DPOAE amplitude was not large.
One proposed DPOAE screening protocol is analogous to the behavioral SRO technique in that it includes an initial broad frequency sweep done in 1/6-octave steps to identify the highest frequency at which a valid response of +6 signal-to-noise ratio can be measured followed by additional monitoring of several frequencies near this limit at each chemotherapy treatment.
There were no significant effects on DPOAE amplitudes pre- and postexposure.
The order of conventional and high-frequency pure-tone audiometry and DPOAE tests were counter-balanced and the same clinician tested each participant in the pre- and post-match assessments.
DPOAE testing is a non-invasive test where a small probe is inserted into the outer ear canal of the child.
METHODS We used DPOAE to screen newborn infants from February 1997 to March 1999.
He screened 1,002 infants between 1 and 3 days old using the 20-minute DPOAE test.
Selected patients were referred to the rehabilitation of the institution, to the achievement of the audiologic evaluation, being composed of PTA, TEOAE and DPOAE, preceded by the inspection of the external acoustic meatus, for investigation of possible changes that could interfere with the result of the evaluation.