Related Experiment Video
Updated: May 1, 2026

A Method to Study Adaptation to Left-Right Reversed Audition
Published on: October 29, 2018
[The study of distortion products otoacoustic emissions in pseudo-anacousia]
1Beijing Institute of Forensic Medicine & Science, Beijing 100040.
Objective:
To explore the technique that distinguish pseudo-anacousia.
Methods:
60 cases were divided into three groups (normal group, deafness sensorineura group and pretending hearing loss group). They all had been tested by distortion products otoacoustic emissions technique.
Results:
(1) The DPOAE incidence of normal group is 94.00%. the DPOAE incidence of deafness sensorineura group is 22.00%. There were significant differences at statistics in DPOAE incidence (P < 0.01). those proved that patients (deafness sensorineura group) were in hearing problem. (2) The DPOAE incidence of pretending hearing loss group is 93.00%, there were no significant differences at statistics in DPOAE incidence between normal group and pretending hearing loss group (P > 0.01), furthermore when behavior threshold is over 50 dBHL, DPOAE incidence is no score.
Conclusion:
This study shows the technique can distinguish pretending hearing loss. The application of DPOAE can be used as a new tool in cases assessment of clinic forensic medicine.
Related Concept Videos
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
Perception of Sound Waves
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
Sound Waves: Interference
Anatomy of the Ear
Auditory Perception
Perceiving Loudness, Pitch, and Location
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...

