Dr Andrew Thomason - Faculty of Occupational Medicine

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Defining Noise-induced Hearing Loss • “When any single measurement of hearing threshold level (HTL) at 3, 4 or 6 kHz is at least 10 dB greater than the HTL at 1 kHz or 2kHz” (Coles 2000). • Accompanied a history of sufficient noise exposure (MRC 1986), accompanied by typical notch/bulge on the audiogram.
Testing for the effect of confounding factors. • Blood group, eye colour, smoking, handedness, exposure to nonoccupational noise, family history of deafness and childhood ear infection were tested for influence on hearing loss. None was shown to contribute significantly.
Page 1 and 2: Are RAF Regiment Gunners Sustaining
Page 3 and 4: The Aim • To audit the occupation
Page 5 and 6: RAF Regiment Operational Tempo. •
Page 7 and 8: What noise exposure on PDT/ ops?
Page 9 and 10: Hearing protection and surveillance
Page 11 and 12: Why no earplugs? • On Combat Oper
Page 13 and 14: Referrals to OM for NIHL • Regime
Page 15 and 16: Participants. • 51 Field Sqn retu
Page 17: Determining Hearing Loss. • Adjus
Page 21 and 22: Testing for a difference in hearing
Page 23 and 24: Where Noise Exposure Occurred • O
Page 25 and 26: Auditing the frequency of hearing s
Page 27 and 28: Conclusions and recommendations:
Page 29 and 30: Mastiff IED strike. Op Herrick May

Dr Andrew Thomason - Faculty of Occupational Medicine

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