Study of distortion - product otoacoustic emissions during hypothermia in humans Summary

Effect of Hypothermia on Distortion Product Otoacoustic Emission Findings in Children Undergoing Congenital Open Heart Surgery

otoacoustic emissions (DPOAE) generated from the OHC of the organ of Corti. Temperature is controlled (within certain rigid limits) in warm-blooded animals including human beings. To investigate extreme hypothermia in our study we selected patients undergoing congenital open heart surgery where body temperature can be lowered over a large temperature interval. To monitor inner ear functions, we...

Study of the hearing in children born from pregnant women exposed to occupational noise: Assessment by distortion product otoacoustic emissions Summary

Technical report: distortion product otoacoustic emissions that are not outer hair cell emissions.

PURPOSE To present a case study in order to alert clinicians to the possibility of occurrence of intermodulation distortion during otoacoustic emissions testing that arises from the cavity formed by the external auditory meatus and tympanic membrane rather than from the inner ear, compromising the reliability and validity of otoacoustic emissions testing. RESEARCH DESIGN Prospective case stud...

The E ect of Amplitude Modulated Contralateral Signals on Distortion Product Otoacoustic Emissions

Contralateral stimulation of the auditory system causes changes in levels of otoacoustic emissions. The main objective of this study was to determine the changes in the level of distortion product otoacoustic emissions for contralaterally presented unmodulated broad-band noise, or amplitude modulated broad-band noise. Two types of modulating signal were used in the investigations (sine or recta...

Latency of DPOAE in milliseconds and waves Summary

The latency of Distortion Product Otoacoustic Emissions is defined as the time interval between the wave onset from initial stimulation and the return to the ear canal. Aim: The aim of this research was to verify the latency of the distortion product otoacoustic emissions in normal hearing adults, analyzing the influence of the gender, ear, frequencies and measurements. Study design: clinical p...