Liu H H, Liu S, Li Y, Zheng Z P, Jin X, Li J, Ren C C, Zheng J, Zhang J, Chen M, Hao J S, Yang Y, Liu W, Ni X
Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China.
Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China.
Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2017 May 7;52(5):349-354. doi: 10.3760/cma.j.issn.1673-0860.2017.05.006.
The purpose of the present study was to investigate the effects of noise competition on word perception in normal hearing (NH) children and children with cochlear implantation (CI). To estimate the contribution of noise competition on speech perception, word perception in speech-shaped noise(SSN)and 4-talker babble noise(BN) with Mandarin Lexical Neighborhood Test were performed in 80 NH children and 89 children with CI. Corrected perception percentages were acquired in each group. Both signal to noise ratio (SNR) and noise type influenced the word perception. In NH group, corrected percentages of disyllabic word perception in SSN were 24.2%, 55.9%, 77.1%, 85.1% and 88.9% at -8, -4, 0, 4 and 8 dB SNR, corresponding corrected percentages of monosyllabic word were 13.9%, 39.5%, 60.1%, 68.8% and 80.1%, respectively. In BN noise, corrected percentages of disyllabic word were 2.4%, 24.3%, 55.6%, 74.3% and 86.2%, corresponding monosyllabic word were 2.3%, 20.8%, 47.2%, 61.1% and 74.8%, respectively. In CI group, corrected percentages of dissyllabic word in SSN and BN at 10 dB SNR were 65.5% and 58.1%, respectively. Corresponding monosyllabic word were 49.0% and 41.0%. For SNR=5 dB, corrected percentages of disyllabic word in SSN and BN were 50.0% and 38.1%, corresponding corrected percentages of monosyllabic word were 40.8% and 25.1%, respectively. Analysis indicated that the masking effect were significantly higher in BN compared with SSN. Noise competition influence word perception performance significantly. In specific, the influence of noise on word perception is bigger in children with CI than in NH children. The masking effect is higher in BN noise when compared with SSN.
本研究的目的是调查噪声竞争对正常听力（NH）儿童和人工耳蜗植入（CI）儿童单词感知的影响。为了评估噪声竞争对言语感知的作用，对80名NH儿童和89名CI儿童进行了普通话词汇邻域测试，以测量他们在言语噪声（SSN）和四说话者嘈杂噪声（BN）中的单词感知。计算了每组的校正感知百分比。信噪比（SNR）和噪声类型均会影响单词感知。在NH组中, 在信噪比为-8、-4、0、4和8 dB时，SSN中双音节词的校正感知百分比分别为24.2%、55.9%、77.1%、85.1%和88.9%，相应的单音节词校正百分比分别为13.9%、39.5%、60.1%、68.8%和80.1%。在BN噪声中，双音节词的校正百分比分别为2.4%、24.3%、55.6%、74.3%和86.2%，相应的单音节词分别为2.3%、20.8%、47.2%、61.1%和74.8%。在CI组中，在10 dB信噪比时，SSN和BN中双音节词的校正百分比分别为65.5%和58.1%。相应的单音节词分别为49.0%和41.0%。对于信噪比=5 dB，SSN和BN中双音节词的校正百分比分别为50.0%和38.1%，相应的单音节词校正百分比分别为40.8%和25.1%。分析表明，与SSN相比，BN中的掩蔽效应显著更高。噪声竞争对单词感知表现有显著影响。具体而言，噪声对CI儿童单词感知的影响大于NH儿童。与SSN相比，BN噪声中的掩蔽效应更高。
