Pitch, loudness and frequency selectivity in low-frequency hearing loss

摘要: Patients with Meniere's disease and cochlear hydrops show fluctuating low-frequency hearing loss (FLFHL). At present these changes are followed as patients' subjective reports occasional measurements. Consecutive long-term measurements should provide more comprehensive information on the fluctuations than audiogram used today constitute an approach to quantify fluctuations. Quantifications could potentially be define subgroups evaluate treatments. This thesis aims introduce 'home audiometry' monitor function in monaural FLFHL. The approaches contain assessment of other manifestations diseases such frequency selectivity coding auditory system. Long-term monitoring binaural loudness pitch matches showed that patients had daily not normal-hearing subjects. average day-to-day difference was considered a measure activity. hydrops, both groups references. There no simple relation between simultaneous symptom ratings, corroborating importance It seems possible separate using matches. prove essential feature understanding clinical treatment trials. deviant observed during suggest inner ear physiology only related pure tone hearing. probable cause is excessive fluid volume affected ear. Indeed, after pressure exposure hypobaric chamber, threshold improvements were seen However, there individual subjects regarding speech recognition, outer hair cell function, selectivity. But deteriorations also seen, mainly Moreover, experimentally reducing conflicting ear, matching precision improved some extent. concluded audiograms today. More advanced can done well, which blunt audiometry. Separate identified by quantifications methods set new standard for evaluation (Less)