SPONTANEOUS OTOACOUSTIC EMISSIONS Meaning and
Definition
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Spontaneous otoacoustic emissions (SOAEs) refer to the naturally occurring sounds that are generated by the inner ear, specifically the cochlea. These emissions are characterized by their spontaneous and automatic nature, meaning that they occur without any external stimulation or effort from the individual.
SOAEs are typically measured using sensitive microphones placed in the ear canal to detect the faint sounds produced by the cochlea. These emissions can vary in intensity and frequency, and their characteristics can differ among individuals. They are most commonly observed in individuals with normal hearing, particularly in younger individuals.
The exact cause of SOAEs is not fully understood, but it is believed to be related to the biomechanical activity of the outer hair cells in the cochlea. These cells, which are responsible for amplifying sound signals in the inner ear, may spontaneously vibrate and produce sound waves that can be detected as emissions. The presence of SOAEs is generally considered an indicator of healthy and functioning outer hair cells.
The study of spontaneous otoacoustic emissions can provide valuable information about the integrity of the cochlear system and the overall health of the auditory system. They can be used in audiometric evaluations to assess hearing sensitivity, and their absence or abnormal characteristics may indicate underlying hearing disorders or abnormalities in the cochlea.
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