听觉耐受下降与耳鸣

Decreased sound tolerance and tinnitus

听觉耐受下降（decreased sound tolerance）是指对声音的容忍度降低,或指对声音的敏感性增强,包括听觉过敏,厌声症,恐声症〔1〕。耳鸣是指在周围环境中无相应声源或电刺激存在的情况下,患者自觉耳内或颅内有声音的一种主观感觉。

Summary Decreased sound tolerance includes hyperacusis and/or misophonia （phonophobia）. As a commonly subjective symptom, tinnitus is defined to be a sound perceived in the ear or head without corresponding sound or electrical stimulus in the surrounding environment. It is usually occured with or without hearing loss or harmful psychic reaction, which includes dyssomnia, annoy, rage, anxiety, depress, hard to concentrate, etc. Frequently, tinnitus is accompied by decreased sound tolerance, while this text is aimed to review the corelated concepts of decreased sound tolerance,and focus on the hyperacusis which is a more common symptom.