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Distortion product emission latency in normal hearing adults
Veridiana de Vivo Marques1, Marisa Frasson de Azevedo
1Universidade Federal de São Paulo, Escola Paulista de Medicina. verivivo@hotmail.com
Background:
Distortion product emission latency in normal hearing adults.
Aim:
To record distortion product otacoustic emission (DPOAE) in normal hearing adults, comparing interaural and gender differences.
Method:
DPOAE was measured in 60 normal hearing individuals (30 female and 30 male), using the Latency-gram test and analyzing 2f1-f2 (frequency ranged from f2 = 720 Hz to f2 = 6445 Hz).
Results:
Latency decreased as the stimulus frequency increased; interaural differences within subjects were not found. Males presented longer delays in comparison to the females.
Conclusion:
The latency decrease observed with the increase in the frequency stimulus is consistent with the frequency codification characteristics of the basilar membrane. Gender differences have been attributed to differences in the cochlea average length.