Kumar Prawin, Grover Vibhu, Publius A Sam, Sanju Himanshu Kumar, Sinha Sachchidanand
Department of Audiology, All India Institute of Speech and Hearing, Mysuru 6, Karnataka, India.
Department of Audiology and Speech-Language Pathology, Amity Medical School, Amity University, Gurgaon, Haryana, India.
World J Otorhinolaryngol Head Neck Surg. 2016 Dec 23;2(4):214-218. doi: 10.1016/j.wjorl.2016.11.006. eCollection 2016 Dec.
Contralateral suppression of oto acoustic emission (OAE) is referred as activation of efferent system. Previous literature mentioned about the importance of contralateral suppression of OAEs as a tool to assess efferent system in different groups of population. There is dearth of literature to explore the efferent system function in experienced musicians exposed to rock music using TEOAEs and DPOAEs.
Two groups of participant (14 rock musicians and 14 non-musicians) in the age range of 18-25 years were involved in the study. Contralateral suppression of TEOAEs and DPOAEs were measured using ILO (Version 6) in both groups.
Descriptive statistics showed higher suppression of TEOAEs and DPOAEs in rock-musicians at most of the frequencies in comparison to non-musicians. For DPOAE measures, Mann Whitney test results revealed significantly greater DPOAE suppression only at 1 kHz and 3 kHz in rock-musicians compared to non-musicians. For within group comparison, Kruskal Wallis test results revealed there were significant difference observed across most of the frequencies i.e. at 1 kHz, 3 kHz and 6 kHz. For TEOAE measures, Mann Whitney test results revealed that only at 2 kHz, TEOAE suppression in rock-musician was significantly greater compared to non-musicians. Similarly, Kuskal Wallis test results revealed that within group there were no significant differences observed for most of the frequencies except 2 kHz.
Based on the above finding, present study concludes that rock musicians are having better efferent system compared to non-musicians. No suppression effect at few frequencies probably indicates more vulnerability at those frequencies. Contralateral suppression of DPOAE shows more significant finding in comparison to contralateral suppression of TEOAEs in present study.
耳声发射（OAE）的对侧抑制被称为传出系统的激活。先前的文献提到了OAE对侧抑制作为评估不同人群传出系统工具的重要性。目前缺乏关于使用瞬态诱发耳声发射（TEOAEs）和畸变产物耳声发射（DPOAEs）来探究接触摇滚音乐的经验丰富的音乐家传出系统功能的文献。
两组年龄在18 - 25岁之间的参与者（14名摇滚音乐家和14名非音乐家）参与了该研究。两组均使用ILO（版本6）测量TEOAEs和DPOAEs的对侧抑制。
描述性统计显示，与非音乐家相比，摇滚音乐家在大多数频率下TEOAEs和DPOAEs的抑制更高。对于DPOAE测量，曼-惠特尼检验结果显示，与非音乐家相比，摇滚音乐家仅在1kHz和3kHz时DPOAE抑制显著更大。对于组内比较，克鲁斯卡尔-沃利斯检验结果显示，在大多数频率即1kHz、3kHz和6kHz时观察到显著差异。对于TEOAEs测量，曼-惠特尼检验结果显示，仅在2kHz时，摇滚音乐家的TEOAEs抑制比非音乐家显著更大。同样，克鲁斯卡尔-沃利斯检验结果显示，除2kHz外，组内大多数频率没有观察到显著差异。
基于上述发现，本研究得出结论，摇滚音乐家的传出系统比非音乐家更好。少数频率下无抑制作用可能表明这些频率处更易受损。在本研究中，DPOAE的对侧抑制比TEOAEs的对侧抑制显示出更显著的结果。
