To ascertain the influence of occupational exposure to SPL on the hearing threshold of indoor cycling (IC) instructors. This is a cross-sectional study involving eleven IC instructors at fitness centers in Guarapuava, PR, Brazil Questionnaires were applied to assess occupational characteristics and reported auditory and extra-auditory symptoms. The hearing threshold was evaluated by pure tone audiometry testing at seven moments: after 14 h of acoustic rest, and before and immediately after exposure to SPLs of 95, 85 and 75 dB(A), making a total of 77 measurements of the group of instructors. Differences in means were assessed using the Kruskal–Wallis test. The k-means and composition method was applied using principal component analysis to verify the main factors associated with the broadband multi-frequency measurement at the hearing threshold. The average bilateral hearing threshold showed a significant increase at the intensity of 95 dB(A), at all the tested frequencies (p < 0.05) and at most of the frequencies, at 85 dB(A). Conclusions exposure to the equivalent sound pressure levels of 85 dB(A) and 95 dB(A) significantly altered the average hearing threshold of indoor cycling instructors.

确定职业暴露于 SPL 对室内自行车 (IC) 教练听力阈值的影响。这是一项横断面研究，涉及巴西瓜拉普阿瓦健身中心的 11 名 IC 教练。问卷用于评估职业特征和报告的听觉和听觉外症状。在七个时刻通过纯音测听测试评估听力阈值：声学休息 14 小时后，以及暴露于 95、85 和 75 dB(A) SPL 之前和之后，总共对一组进行了 77 次测量。导师。使用 Kruskal-Wallis 检验评估平均值的差异。使用主成分分析应用 k 均值和组合方法来验证与听力阈值处的宽带多频测量相关的主要因素。p  < 0.05) 并且大多数频率为 85 dB(A)。结论 暴露于 85 dB(A) 和 95 dB(A) 的等效声压级显着改变了室内自行车教练的平均听力阈值。