Bernacki K, Rafalski H
Med Pr. 1978;29(5):425-33.
An otolaryngological and audiometric examination was performed among 901 motor-sawers occupationally exposed to motor-saw noise, and among 177 persons in a non-exposed control group. Hearing impairment of various degrees was found in 83.7% of motor-sawers examined. In 63.5% of motor sawers hearing impairment was due to noise exposure. The hearing impairment found, was in 88% a reciprocal receptive loss, more intensified in the left ear. It was positively correlated with motor-savers' age, duration of employment in exposure to motor-saw noise, and the amount of wood cut. The average hearing impairment in both ears was significantly higher among motor-sawers with hearing damage due to various causes, than among those with damage due to the motor-saw noise only, which proves a simultaneous overlapping of different factors inducing impairment, including motor-saw noise.
对901名职业性接触电锯噪音的电锯操作人员以及177名未接触噪音的对照组人员进行了耳鼻喉科和听力检查。在接受检查的电锯操作人员中，83.7%发现有不同程度的听力损伤。在63.5%的电锯操作人员中，听力损伤是由噪音暴露引起的。所发现的听力损伤中，88%为双侧感音神经性听力损失，左耳更为严重。它与电锯操作人员的年龄、接触电锯噪音的工作年限以及木材砍伐量呈正相关。因各种原因导致听力损伤的电锯操作人员双耳平均听力损伤明显高于仅因电锯噪音导致损伤的人员，这证明包括电锯噪音在内的不同致伤因素同时存在重叠。
