Rifle impulse noise affects middle-ear compliance in soldiers wearing protective earplugs

International Journal of Audiology
Agnès JobB Belcourt

Abstract

We tested middle-ear functioning in humans following intense exposure to noise. Noise generated by small caliber firearms was thought to have no effect on the middle-ear. A cross-over design. We measured middle-ear impedance, acoustic reflex, distortion product otoacoustic emissions (DPOAEs), and transient evoked otoacoustic emissions (TEOAEs) before and after practice rounds performed twice per day. Fifty-nine soldiers equipped with earplugs undergoing regular training for a special mission. The mean noise exposure (LAeq8h) was estimated to be 106 ±1 dB SPL. Impedancemetry revealed a significant increase in the compliance and gradient of the tympano-ossicular chain after impulse noise exposure in the right and left ears. Acoustic reflex reactivity did not show a significant change. DPOAEs and TEOAEs were slightly decreased at 2 kHz, and showed a marked asymmetry in disfavor of the left ear. In soldiers with initial high reactivity of acoustic reflex, increased compliance was associated with a significant decrease in left TEOAEs at 1.5 and 2 kHz. Our results suggest that the use of small-caliber firearms, even while wearing earplugs, affects middle-ear function and may play a role in the early stage of auditory fatigue encompas...Continue Reading

References

Jul 1, 1991·The Journal of the Acoustical Society of America·G R Price, J T Kalb
Mar 1, 1989·The Journal of the Acoustical Society of America·G R PriceD Dunn
Apr 1, 1994·Scandinavian Journal of Work, Environment & Health·M E Ylikoski
Mar 1, 1997·Acta Oto-laryngologica·S KhalfaL Collet
Oct 30, 2001·The Journal of the Acoustical Society of America·P C ChanM A Mayorga
Jun 16, 2005·NeuroImage·Michael C StevensKent A Kiehl
Jun 1, 2006·The Laryngoscope·Jean-Bertrand NottetAgnès Job
Jan 12, 2007·The Journal of Trauma·Hua Yang, Yinghui Tan
Dec 11, 2007·Journal of Biomechanical Engineering·Tao Cheng, Rong Z Gan
Nov 30, 2010·Medical Engineering & Physics·Rong Z GanDon Nakmali
May 23, 2014·Journal of Neurophysiology·Jérôme BourienJing Wang

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Citations

Jan 8, 2019·International Journal of Audiology·Shakti K DavisChristopher J Smalt
Aug 19, 2020·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Zahra JafariMajid H Mohajerani

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