Relationship with frequency selectivity and the word recognition impairment in auditory neuropathy patients.

2015 Fiscal Year Final Research Report

• Project/Area Number: 25861537
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Otorhinolaryngology
• Research Institution: Niigata University
• Principal Investigator: IZUMI Shuji 新潟大学, 医歯学総合病院, 助教 (20452055)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: Auditory Neuropathy / 周波数選択性 / 聴覚フィルタ / 後迷路性難聴

Outline of Final Research Achievements

Auditory Neuropathy patients exhibit poor word recognition score compared with pure tone threshold. We hypothesized that the cause of the word recognition impairment in auditory neuropathy patients is frequency selectivity dysfunction. We examined auditory filter width to estimate the frequency selectivity in auditory neuropathy and the other retrocochlear hearing impairment patients. In result, auditory filter widths in those subjects were ranged from normal to mild enlargement. It indicates that the cause of word recognition impairment in auditory neuropathy patients were not frequency selectivity dysfunction. On the other hand, we found that these patients showed instability of pure tone threshold. It may be one of the causes of poor word recognition in auditory patients.

Free Research Field

耳鼻咽喉科学