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目的探讨非线性频率压缩(nonlinear frequency compression,NLFC)助听器对以汉语普通话为母语的耳聋患者噪声下言语识别的影响,为耳聋患者助听器选配及助听效果评估提供参考。方法 25例以汉语普通话为母语的感音神经性聋患者,均双耳佩戴助听器,根据患者是否有NLFC助听经验分为A、B两组:A组13例有NLFC助听经验,日常使用NLFC技术;B组12例无NLFC助听经验,日常使用传统放大(conventional process,CP)技术。所有患者分别在NLFC和CP条件下进行噪声下句子识别测试,比较其结果。结果 A组患者在NLFC和CP条件下的噪声下言语识别率分别为82.33%±16.06%、76.70%±18.08%,前者高于后者,差异有显著统计学意义(P<0.01);B组分别为83.04%±12.56%、81.79%±20.07%(P=0.19),差异无统计学意义。A组患者在NLFC和CP条件下的高频(4、6、8kHz)助听听阈分别为53.54±7.30、57.01±6.81dB SPL,B组分别为57.42±8.38和61.21±7.42dB SPL,两组NLFC条件下的助听听阈低于CP条件,差异均有统计学意义(P<0.01)。经统计学回归处理,患者在NLFC和CP条件下的高频助听听阈差值与言语识别率差值呈线性相关(r=0.63,t=3.89,P=0.007)。结论 NLFC技术可改善患者高频可听度及噪声下言语识别,一定的NLFC使用经验可使NLFC助听效果最大化。
Objective To investigate the influence of nonlinear frequency compression (NLFC) hearing aids on speech recognition under the noise of Chinese mandarin-speaking deaf patients, and to provide a reference for hearing aid selection and hearing aid evaluation in deaf patients. Methods Twenty-five patients with sensorineural deafness who were native Chinese speakers were both wearing hearing aids. According to whether patients had NLFC hearing aid experience, they were divided into A and B groups: 13 patients in group A had NLFC hearing aid experience, NLFC technology; Group B, 12 patients without NLFC hearing aid experience, routine use of conventional process (CP) technology. All patients under the conditions of NLFC and CP noise under sentence recognition test, compare the results. Results The speech recognition rates of patients in group A under the noise of NLFC and CP were 82.33% ± 16.06% and 76.70% ± 18.08%, respectively. The former was higher than the latter (P <0.01) Respectively, 83.04% ± 12.56%, 81.79% ± 20.07% (P = 0.19), the difference was not statistically significant. The hearing threshold of high frequency (4, 6, 8 kHz) in group A was 53.54 ± 7.30 and 57.01 ± 6.81 dB SPL respectively under NLFC and CP conditions, and the B group was 57.42 ± 8.38 and 61.21 ± 7.42 dB SPL, respectively The listening hearing threshold under NLFC condition was lower than CP condition, the differences were statistically significant (P <0.01). After statistical regression, there was a linear correlation (r = 0.63, t = 3.89, P = 0.007) between the hearing threshold difference and the speech recognition rate difference under NLFC and CP conditions. Conclusion The NLFC technique can improve high-frequency audibility and speech recognition in patients with noise, and some NLFC experience can maximize the hearing aid effect of NLFC.