Effects of the ovarian and contraceptive cycles on absolute thresholds, auditory fatigue and recovery from temporary threshold shifts at 4 and 6 kHz.
Effects of the ovarian and contraceptive cycles on absolute thresholds, auditory fatigue and recovery from temporary threshold shifts at 4 and 6 kHz.
复制标题
卵巢和避孕周期对绝对阈值、听觉疲劳以及 4 和 6 kHz 临时阈值偏移恢复的影响。
作者：
J. Petiot;J. Parrot
对12名正常生理周期的年轻女性、11名口服避孕药的年轻女性和8名年轻男性在105 dB(A)粉红噪声暴露前后20分钟进行4和6 kHz绝对阈值测试。服用避孕药的女性比正常周期的女性表现出更低的静息阈值，更大的临时阈值移位（TTS）和更高的恢复率。静息阈值、听觉疲劳和听觉疲劳恢复的分析没有发现任何与性别相关的差异。在4千赫的听觉疲劳恢复和6千赫的静息阈值期间，观察到与月经周期和避孕周期阶段相关的显著差异。肯德尔一致性系数的应用证实了这些结果。在正常周期的女性和口服避孕药的女性中，绝对阈值在月经期间最高，在排卵后阶段最低。口服避孕药可能是比月经周期更重要的影响听力的因素。
Absolute thresholds at 4 and 6 kHz were tested in three sessions before and after 20 min of exposure to 105 dB(A) pink noise in 12 young normal-cycling females, 11 young females on oral contraceptives and 8 young men. Women on contraceptives showed lower resting thresholds, larger temporary threshold shift (TTS) and higher recovery rates than normal-cycling females. The analysis of resting thresholds, auditory fatigue and recovery from auditory fatigue did not evidence any sex-linked difference. Significant differences linked to the phases of the menstrual cycle and of the contraceptive cycle were observed during recovery from auditory fatigue at 4 kHz and in resting thresholds at 6 kHz. Application of Kendall's coefficient of concordance confirmed these results. Absolute thresholds were highest at menstruation and lowest in the postovulatory phase in normal-cycling females and in women on oral contraceptives, during the days of pill ingestion. Oral contraception is probably a more important factor of change in hearing performance than the phases of the menstrual cycle.