Narula A A, Mason S M
Department of Otolaryngology and Medical Physics, Queen's Medical Centre, Nottingham.
J R Soc Med. 1988 Jun;81(6):338-40. doi: 10.1177/014107688808100613.
The symptom of poor speech discrimination in the presence of background noise is a well-recognized feature of elevated hearing thresholds due to cochlear damage. Similar symptoms occasionally occur in patients with no detectable audiological abnormality. In a study to evaluate the frequency selectivity of such patients consistent abnormalities were found using an electrophysiological technique based on extratympanic electrocochleography. These findings indicated that frequency specific responsiveness of the cochlea may be affected before conventional behavioural tests reveal abnormalities. This syndrome has been described as selective dysacusis.
在存在背景噪声的情况下言语辨别能力差的症状是由于耳蜗损伤导致听力阈值升高的一个公认特征。类似症状偶尔也会出现在没有可检测到的听力学异常的患者中。在一项评估此类患者频率选择性的研究中，使用基于鼓膜外电耳蜗图的电生理技术发现了一致的异常情况。这些发现表明，在传统行为测试显示异常之前，耳蜗的频率特异性反应性可能就已受到影响。这种综合征被称为选择性听觉障碍。
