Determination of the probability of hearing loss in persons exposed to the noise of small arms

Aim to analyze the indicators of distortion-product otoacoustic emissions (DPOAE) in persons exposed noise small arms and, on basis most significant them, determine probability developing hearing loss.
 Material and methods. We examined 30 male volunteer shooters (60 ears) aged from 19 years. The fired shots AK74M short bursts (2-3 a burst) at targets when performing shooting exercises three positions: knee, standing lying down, free acoustic field without use personal protective equipment organ. All participants were for before after firing arms. method binary logistic regression was used develop predictive model.
 Results. A mathematical model has been developed assess loss according DPOAE exposure This model, with standard classification threshold p = 0.5, an accuracy 83.3%, sensitivity 79.0%, specificity 88.0%. According results ROC analysis resulting area under characteristic curve equal 0.924 (0.834;1.0), which indicates excellent quality Conclusion. signal/noise indicator (dB) frequency 4.2 kHz left level emission exposure. These indicators, as well age shooter, allow us loss.