目的　研究耳内式助听器的特性。方法　应用GSI - 16纯音听力计附声场测听系统 ,观察 16 8耳不同类型助听器使用者助听前的听力损失和助听后的听力补偿 ;测试裸耳及佩戴不同类型耳内式助听器后外耳道共振峰幅值 ;测试 2 2耳耳内式助听器使用者的言语分辨率。结果　耳内式助听器 10 0 0～ 40 0 0Hz的听力补偿优于2 5 0～ 5 0 0Hz的听力补偿 (P <0 .0 1) ;46耳裸耳及佩戴助听器后外耳道共振峰值分别为 2 92 9Hz及 3 0 16Hz,两者无明显差异 (P <0 .0 5 ) ,ITE、ITC和CIC在助听器无输出的情况下由于耳廓的集声和滤波作用在其麦克风口声增益分别为 6 .2 9、8.0 8和 9.0 1dBSPL ,三者有极显著性差异 (P <0 .0 1) ;开放法、闭合法 2 2耳言语测试显示助听器使用者助听前后及对单音节词和双音节词的分辨率有极显著性差异 (P <0 .0 1) .结论　耳内式助听器的听力补偿高频优于低频 ,对外耳道的共振峰值影响较少 ,使用者的言语分辨率可提高 Objective To study the characteristics of intra-aural hearing aids. Methods The GSI - 16 pure tone audiometer was used to measure the sound field of the hearing aids. The hearing loss of hearing aid after hearing aid of 16 8 different hearing aid users and the hearing compensation after hearing aid hearing were measured. The test of naked ears and external auditory canal after wearing different types of in - Resonance amplitude; Test speech resolution of 2 2 ear-in-ear hearing aid users. Results Hearing compensation of 100 ~ 400Hz was better than that of 250 ~ 500Hz (P <0.01). The values ​​of resonance of 46 ears and hearing aids were 2 92 9Hz and 30 16Hz respectively, there was no significant difference between them (P <0.05). The acoustic gain of the ITE, ITC and CIC in the microphone with no output of the hearing aid was 6.29,8.0 8 and 9.0 1dBSPL, the three have extremely significant difference (P <0.01); open method, closed method 2 2 auricular speech tests show that hearing aid users before and after hearing aid and monosyllabic words and The resolution of two-syllable words was significantly different (P0.01) .Conclusion The high frequency of hearing compensation of the intra-aural hearing aid is better than low frequency, and has less influence on the resonance peak of the external auditory meatus. The speech resolution of the user can be improve