de Souza Chelminski Barreto Monique Antunes, Costa Carolina Souza Alves, de Souza Guarita Lizandra Kely, Oliveira Carlos Augusto Costa Pires, Bahmad Júnior Fayez
Brasilia Area Military Hospital, Brazil.
Int Tinnitus J. 2011;16(2):123-9.
Exposure to continuous or impulse noise may lead to High Sound Pressure Induced Hearing Loss (HSPIHL) or to acoustic trauma in soldiers. Auditory evaluation by means of evoked otoacoustic emissions (EOAE) has been demonstrating its importance in the detection of subtle changes in cochlear function still unidentified in threshold tone audiometry in subjects exposed to noise.
Studying Distortion product otoacoustic emissions (DPOAEs) before and after exposure to impulse noise in soldiers of the Brazilian Army.
This is an analytical, observational, longitudinal and prospective study. Auditory evaluation was performed by means of DPOAEs in 60 soldiers before and after exposure to impulse noise, of whom 30 were reevaluated immediately after exposure and 30 were reevaluated 24 hours after exposure.
The statistical analysis revealed that both groups reevaluated after exposure to impulse noise showed a decrease in amplitudes in comparison with the tests before exposure. As for the signal/noise ratio, there was a significant difference at the frequencies of 6 and 8KHz and there was a significant association between a tinnitus complaint and the group reevaluated immediately after exposure to noise.
The DPOAE test proved sensitive to detect subtle shifts after exposure to impulse noise, both with regard to the amplitude criterion and with regard to the signal/noise ratio even 24 hours after exposure. This demonstrated the applicability of the DPOAE test in monitoring the hearing of soldiers exposed to impulse noise.
持续或脉冲噪声暴露可能导致士兵出现高强度噪声性听力损失（HSPIHL）或听觉创伤。通过诱发耳声发射（EOAE）进行听觉评估已证明其在检测噪声暴露受试者阈值纯音听力测定中仍未识别出的耳蜗功能细微变化方面的重要性。
研究巴西陆军士兵在暴露于脉冲噪声前后的畸变产物耳声发射（DPOAE）情况。
这是一项分析性、观察性、纵向和前瞻性研究。对60名士兵在暴露于脉冲噪声前后进行DPOAE听觉评估，其中30名在暴露后立即重新评估，30名在暴露后24小时重新评估。
统计分析显示，与暴露前测试相比，两组在暴露于脉冲噪声后重新评估时振幅均降低。至于信噪比，在6kHz和8kHz频率处存在显著差异，并且耳鸣主诉与暴露于噪声后立即重新评估的组之间存在显著关联。
DPOAE测试被证明在检测暴露于脉冲噪声后的细微变化方面很敏感，无论是在振幅标准还是在信噪比方面，即使在暴露后24小时也是如此。这证明了DPOAE测试在监测暴露于脉冲噪声的士兵听力方面的适用性。
