Li Jian-hui, Xi Xin, Zhao Yang, Ji Fei, Chen Ai-ting, Yang Wei-yan
Department of Otorhinolaryngology Head and Neck Surgery, General Hospital of People's Liberation Army, Beijing 100853, China.
Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2010 Jul;45(7):565-9.
To establish the criteria of the disproportionate loss of Mandarin monosyllable discriminative abilities to pure tone hearing thresholds.
Total of 165 patients with varying degrees of sensorineural hearing loss were recruited for routine audiological evaluations. The speech discrimination scores were obtained by Mandarin phonemic-balanced monosyllable lists via self-made speech audiometric software. The Performance-Intensity (P-I) function for individual ear was obtained by the same list which was administrated in ascending intensities, with 25 monosyllables presenting randomly. The lowest intensity was determined by the lowest pure tone threshold among all audiometric frequencies minus 5 dB. The intensities were increased in 5 dB step until the score was 100% or the intensity was reached to the patient's uncomfortable level. The PB(max) was obtained from the P-I plot. Three parameters about pure tone average hearing thresholds, including PTA(1) (average of 0.5, 1 and 2 kHz), PTA(2) (average of 1, 2 and 4 kHz) and PTA(3) (average of 0.5, 1, 2 and 4 kHz), as well as three parameters about audiogram slope, including Slope(0.5) (4 kHz minus 0.5 kHz), Slope(1) (4 kHz minus 1 kHz) and Slope(2) (4 kHz minus 2 kHz), were calculated respectively. The correlations between PB(max) and above parameters were analyzed by SPSS10.0 statistical software.
The audiogram slopes were not shown any correlation with PB(max), while the pure tone average thresholds, especially PTA(3) (r = -0.595, P = 0.000) were confirmed to correlate with PB(max). In the scatter plot based on PB(max) and PTA(3), a linear boundary was constructed encompassing approximately 99% of observed data collected from the sensorineural hearing-impaired.
Any PB(max) score falling below the boundary should be considered with high possibility and disproportionately poor comparison with pure tone hearing thresholds.
建立普通话单音节辨别能力与纯音听阈不成比例下降的标准。
招募165例不同程度感音神经性听力损失患者进行常规听力学评估。通过自制言语测听软件，使用普通话音素平衡单音节词表获得言语辨别得分。通过以递增强度呈现同一词表（随机呈现25个单音节词）获得单耳的强度-性能（P-I）函数。最低强度由所有测听频率中最低纯音听阈减去5 dB确定。强度以5 dB步长增加，直至得分达到100%或达到患者的不适强度水平。从P-I图中获得PB(max)。分别计算关于纯音平均听阈的三个参数，包括PTA(1)（0.5、1和2 kHz的平均值）、PTA(2)（1、2和4 kHz的平均值）和PTA(3)（0.5、1、2和4 kHz的平均值），以及关于听力图斜率的三个参数，包括Slope(0.5)（4 kHz减去0.5 kHz）、Slope(1)（4 kHz减去1 kHz）和Slope(2)（4 kHz减去2 kHz）。使用SPSS10.0统计软件分析PB(max)与上述参数之间的相关性。
听力图斜率与PB(max)未显示出任何相关性，而纯音平均听阈，尤其是PTA(3)（r = -0.595，P = 0.000）被证实与PB(max)相关。在基于PB(max)和PTA(3)的散点图中，构建了一条线性边界，该边界涵盖了从感音神经性听力受损者收集的约99%的观察数据。
任何低于该边界的PB(max)得分应被高度怀疑与纯音听阈相比不成比例地差。
