Related Experiment Video
Updated: Aug 12, 2026

Surgical Induction of Endolymphatic Hydrops by Obliteration of the Endolymphatic Duct
Published on: January 22, 2010
Evoked acoustic emissions in high-frequency vs. low/medium-frequency hearing loss
1Department of Otolaryngology/Head and Neck Surgery, Haukeland Sykehus, University of Bergen, Norway.
Abstract:
Evoked otoacoustic emissions have been recorded from ears with high- and low/medium-frequency hearing losses using a simple technique with fixed stimulus intensity and no suppression of stimulus artifact. Ears with low/medium frequency hearing loss exceeding 40 dB HL generate responses ending before 17.5 ms after stimulus onset. This may be used for testing of low/medium frequency hearing in ears where BRA indicates normal or only slightly impaired high-frequency hearing. Interrelationships between various response parameters and hearing losses have not been demonstrated statistically.
Related Concept Videos
The Cochlea
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 frequency...
Sound Intensity Level
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and hence a...
Anatomy of the Ear
Auditory Pathway
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
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 identifying...

