耳鸣掩蔽治疗条件的测定

目的 寻找耳鸣掩蔽治疗较为合适的掩蔽时间、掩蔽声类型的组合。方法 受试的２７名耳蜗性耳鸣患者，平均分别来自于三个治疗点，并定为甲、乙、丙三组。按析因试验设计原理将掩蔽声设定为窄带噪声（ｎａｒ－ｒｏｗ ｂａｎｄ ｎｏｉｓｅ，ＮＢＮ）、宽带噪声（ｗｉｄｅ ｂａｎｄ ｎｏｉｓｅ，ＷＢＮ）和言语噪声（ｓｐｅｃｈ ｎｏｉｓｒｅ，ＳＮ）三个因素，掩蔽时间设定为１５、３０、４５ｍｉｎ三个水平共九种组合，每组内患

Measurement of the Parameters for Tinnitus Masking Therapy

Objective To search for the optimum external masking time and tonal models for patients with tinnitus.Methods Twenty-seven patients with cochlear tinnitus were selected respectively from three different out-patients departments and divided into three groups . Nine patients in every group were treated with different masking parameters according to factorial design which had three masking noises, i.e. narrow band noise (NBN), wide band noise (WBN), speech noise (SN),and three masking time ranges, i.e.15,30,45 minutes. The results before and after treatment were compared and analysed with analysis of variance (ANOVA). Results The treatment effect when masking for 15 minutes was worse than that for 30,45 minutes,but there was no difference between 30 and 45 minutes.The NBN had the best effect when tinnitus signal was single,the WBN was effective for tinnitus with multiple sounds. Conclusion NBN or WBN masking for 30 minutes showed better therapeutic effect.