Department of Audiology, All India Institute of Speech and Hearing, Manasagangothri, Mysore, India.
Auris Nasus Larynx. 2010 Jun;37(3):299-302. doi: 10.1016/j.anl.2009.09.013. Epub 2009 Oct 28.
The present study compared the amplitudes of transient evoked otoacoustic emissions (TEOAEs) and efferent suppression in smokers and non-smokers taking age into consideration.
Fifty smokers and fifty non-smokers who had normal hearing sensitivity with age range of 20-69 years were considered for the present study. TEOAEs were measured in both the groups of subjects across different age groups. The functioning of the efferent auditory system was evaluated in both the groups by recording the TEOAEs in the presence of a contralateral white noise (CWN) of 70dB SPL.
Age did not have a significant effect on the TEOAEs amplitude in both the groups of subjects. However, the TEOAEs amplitude was significantly reduced in smokers compared to non-smokers. The results found a significant effect of age on the amplitude of efferent suppression in smokers, however, no significant effect was found in the non-smokers group.
It was found that the difference in the amplitude of efferent suppression in smokers was significantly greater for each age group between 20 and 49 years compared to each age group from 50 to 69 years. Results have important implication on the damage to the cochlear structures from smoking.
本研究在考虑年龄因素的情况下，比较了吸烟者和非吸烟者的瞬态诱发耳声发射（TEOAEs）幅度及传出抑制情况。
本研究纳入了50名吸烟者和50名非吸烟者，年龄范围为20 - 69岁，听力正常。对两组受试者在不同年龄组进行TEOAEs测量。通过记录在70dB SPL对侧白噪声（CWN）存在时的TEOAEs，评估两组的传出听觉系统功能。
年龄对两组受试者的TEOAEs幅度均无显著影响。然而，吸烟者的TEOAEs幅度相较于非吸烟者显著降低。结果发现年龄对吸烟者的传出抑制幅度有显著影响，但在非吸烟者组未发现显著影响。
研究发现，与50至69岁的每个年龄组相比，20至49岁的每个年龄组中吸烟者的传出抑制幅度差异显著更大。研究结果对吸烟对耳蜗结构的损害具有重要意义。
