目的对比speech-ABR在安静及噪声环境下单音节声母、韵母及声调的变化,研究噪声对单音节音位的影响。方法招募正常听力受试者40例(男20例,女20例),母语为汉语普通话。Speech-ABR刺激声为260ms时程的合成言语声/mi/,声调为三声,刺激强度...目的对比speech-ABR在安静及噪声环境下单音节声母、韵母及声调的变化,研究噪声对单音节音位的影响。方法招募正常听力受试者40例(男20例,女20例),母语为汉语普通话。Speech-ABR刺激声为260ms时程的合成言语声/mi/,声调为三声,刺激强度为70d B SPL,记录右耳安静状态下及噪声状态下(信噪比SNR=-10d B)speech-ABR的反应波形。对比起始反应波形(onset response,OR)、过渡反应波形(consonant-to-vowel transition)及频率跟随反应波形(frequency following response,FFR)的潜伏期的变化。并对比安静及噪声状态下声调追踪(pitch tracking)相关系数r的变化。使用SPSS18.0软件进行数据统计分析,数据采用配对t检验分析两组的差异,P<0.05时为差异有统计学意义。结果260ms时程/mi/诱发的言语听性脑干反应波形特征,主要由潜伏期为10ms内的起始反应、潜伏期为80-220ms内的频率跟随反应及最后的终止反应组成,以及潜伏期在10-80ms内的辅音-元音过渡反应。其中起始反应部分为辅音部分所诱发;过渡反应部分为辅-元音的过渡信息诱发;由/mi/中的元音部分所诱发的频率跟随反应部分共由15个波形组成。经配对t检验分析,在安静及噪声环境下进行对比,起始反应峰值(辅音部分)平均潜伏期延长0.85±0.17ms(P=0.000)。过度反应峰值平均潜伏期延长0.75±0.15ms((P=0.000)。频率跟随反应峰值平均潜伏期延长0.38±0.10ms(P=0.000),结果均具有统计学意义。安静环境下声调追踪反应相关系数r均值为0.84±0.08,噪声环境下相关系数r均值为0.74±0.12,两者对比结果具有统计学意义((P=0.000)。结论在噪声环境下,测试音的辅音、元音对应波形潜伏期均发生变化,声调追踪系数会有所下降,提示三种音位均会受到噪声的影响。与以往主观的言语识别率测试方式及诱发电位测试相比,speech-ABR是一种客观方式评估言语声受到噪声干扰情况的测试方法。展开更多
A frequency following response(FFR) of speech auditory brainstem response(speech-ABR) elicited by the speech syllable/da/contains three distinct waves named as D, E and F, corresponding to the structure of the stimulu...A frequency following response(FFR) of speech auditory brainstem response(speech-ABR) elicited by the speech syllable/da/contains three distinct waves named as D, E and F, corresponding to the structure of the stimulus sound. The detection and characterization of FFRs are critical in the study and application of speech-ABRs. Conventional methods detect the latencies of the waves in time domain by measuring the maximal amplitudes of the waveform in the preset windows, which suffers the problem of low quality of FFR waves. In this paper, we defined an instantaneous energy(IE) spectrum based on empirical mode decomposition(EMD)method(EMD-IE method) to detect FFR and measured the latencies of the waves. The results reveal that the FFRs are mostly evident on the second layer of the IE spectra,which would benefit the detection and measurement of the FFRs in clinic.展开更多
文摘目的对比speech-ABR在安静及噪声环境下单音节声母、韵母及声调的变化,研究噪声对单音节音位的影响。方法招募正常听力受试者40例(男20例,女20例),母语为汉语普通话。Speech-ABR刺激声为260ms时程的合成言语声/mi/,声调为三声,刺激强度为70d B SPL,记录右耳安静状态下及噪声状态下(信噪比SNR=-10d B)speech-ABR的反应波形。对比起始反应波形(onset response,OR)、过渡反应波形(consonant-to-vowel transition)及频率跟随反应波形(frequency following response,FFR)的潜伏期的变化。并对比安静及噪声状态下声调追踪(pitch tracking)相关系数r的变化。使用SPSS18.0软件进行数据统计分析,数据采用配对t检验分析两组的差异,P<0.05时为差异有统计学意义。结果260ms时程/mi/诱发的言语听性脑干反应波形特征,主要由潜伏期为10ms内的起始反应、潜伏期为80-220ms内的频率跟随反应及最后的终止反应组成,以及潜伏期在10-80ms内的辅音-元音过渡反应。其中起始反应部分为辅音部分所诱发;过渡反应部分为辅-元音的过渡信息诱发;由/mi/中的元音部分所诱发的频率跟随反应部分共由15个波形组成。经配对t检验分析,在安静及噪声环境下进行对比,起始反应峰值(辅音部分)平均潜伏期延长0.85±0.17ms(P=0.000)。过度反应峰值平均潜伏期延长0.75±0.15ms((P=0.000)。频率跟随反应峰值平均潜伏期延长0.38±0.10ms(P=0.000),结果均具有统计学意义。安静环境下声调追踪反应相关系数r均值为0.84±0.08,噪声环境下相关系数r均值为0.74±0.12,两者对比结果具有统计学意义((P=0.000)。结论在噪声环境下,测试音的辅音、元音对应波形潜伏期均发生变化,声调追踪系数会有所下降,提示三种音位均会受到噪声的影响。与以往主观的言语识别率测试方式及诱发电位测试相比,speech-ABR是一种客观方式评估言语声受到噪声干扰情况的测试方法。
基金National Natural Science Foundation of Chinagrant number:F61172033
文摘A frequency following response(FFR) of speech auditory brainstem response(speech-ABR) elicited by the speech syllable/da/contains three distinct waves named as D, E and F, corresponding to the structure of the stimulus sound. The detection and characterization of FFRs are critical in the study and application of speech-ABRs. Conventional methods detect the latencies of the waves in time domain by measuring the maximal amplitudes of the waveform in the preset windows, which suffers the problem of low quality of FFR waves. In this paper, we defined an instantaneous energy(IE) spectrum based on empirical mode decomposition(EMD)method(EMD-IE method) to detect FFR and measured the latencies of the waves. The results reveal that the FFRs are mostly evident on the second layer of the IE spectra,which would benefit the detection and measurement of the FFRs in clinic.
