Zusammenfassung
This study demonstrates a clear relationship between noise induced
tinnitus (NIT) and efferent neural auditory activity. The effect
of contralateral white noise stimulation on click evoked otoacoustic
emissions (CEOAEs) was studied in chronic tinnitus sufferers and
controls, with and without a noise induced hearing loss (NIHL). For
the non-tinnitus controls, increased contralateral white noise intensities
resulted in decreased CEOAE amplitudes, irrespective of the hearing
configuration. In contrast, the tinnitus patients responded with
increased CEOAE amplitudes, particularly at lower contralateral noise
intensities. While this was observed for both normal hearing and
NIHL tinnitus patients, the effect was more pronounced amongst the
normal hearing group. These findings were interpreted as reflecting
a global efferent disorder in NIT patients, and are considered clinically
relevant to the objective assessment of tinnitus.
- adult;
- adverse
- audiometry;
- auditory
- auditory,
- bone
- brain
- chronic
- cochlea,
- conduction;
- disease;
- diseases,
- effects;
- efferent,
- etiology/physiopathology
- etiology/physiopathology;
- evoked
- hearing
- hearing,
- humans;
- innervation/physiology;
- loss,
- military
- neurons,
- noise,
- noise-induced,
- occupational
- pathways,
- perception,
- personnel;
- physiology;
- potentials,
- stem,
- threshold,
- tinnitus,
Nutzer