Why does a generator mechanic in Kandahar file a hearing-loss claim three years after redeployment?
Picture a contractor who spent four rotations on a forward operating base. He worked the flight line, ran power generators, and slept fifty feet from a diesel plant that never shut off. Nobody handed him double hearing protection. When he came home, the television volume crept up and his wife started repeating herself.
Two years later an audiologist hands him a chart showing a sloping high-frequency loss. Now he wants to file. His questions are the ones every DBA practitioner hears. Is hearing loss even covered. How much is it worth. Which employer is responsible when he worked for three over six years. And which insurance carrier actually pays.
Those questions matter because hearing loss is not a small corner of the DBA docket. It is one of the most frequently litigated occupational disease claims under the Act. Noise is everywhere on a contingency operation. Aircraft, armored vehicles, weapons ranges, power generation, heavy equipment, and constant rotor wash all push sound levels past the threshold where permanent cochlear damage begins.
The Defense Base Act extends the Longshore and Harbor Workers' Compensation Act to overseas contractors. That means hearing-loss claims ride on decades of Longshore precedent and the Act's scheduled-injury machinery. Understanding that machinery is the difference between a claim that settles for a token amount and one that captures the full statutory value. This guide walks through how these claims are proven, dated, and converted into weeks of compensation. It does not tell you which carrier covered which contractor. That answer lives in the records, and finding it is its own investigation.
Is occupational hearing loss actually covered under the Defense Base Act?
Yes. Occupational hearing loss is a compensable injury under the DBA through its incorporation of the Longshore Act. The statute treats noise-induced hearing loss as an occupational disease, which carries important consequences for how the claim is filed and dated.
Two legal labels do most of the work. The first is whether the loss counts as a traumatic injury or an occupational disease. A single acoustic trauma, like an IED blast or a nearby mortar impact, can be a traumatic injury with a discrete date. Cumulative noise exposure across years is the classic occupational disease pattern, and that is what most contractor hearing-loss claims look like.
The second label is the standard of proof. The Longshore Act gives claimants a statutory presumption that a claim falls within the Act once they establish a working relationship and a harm. The employer then carries the burden to rebut it with substantial evidence. For a contractor who worked in a documented high-noise environment, invoking that presumption is often the strongest opening move in the case.
Coverage does not depend on the contractor proving the employer was negligent. The DBA, like all workers' compensation regimes, is no-fault. The mechanic does not have to show his employer failed to issue earplugs. He has to show the exposure happened in the course of covered overseas employment and that measurable hearing loss resulted. Whether the work environment qualifies as DBA-covered in the first place depends on the contract and location, which is why establishing where the work occurred and under what contract vehicle is foundational to any occupational disease claim.
One nuance trips up new practitioners. Hearing loss is one of the few injuries where benefits can be awarded even without lost time from work. Because it is a scheduled injury, a contractor who never missed a shift can still recover a permanent partial disability award the moment the impairment is measured. That decoupling of compensation from wage loss is unusual, and it shapes the entire strategy.
How is hearing-loss impairment measured and converted into a DBA award?
This is where hearing-loss claims become arithmetic. The Longshore Act sets out a schedule of injuries in 33 U.S.C. 908(c). Total loss of hearing in both ears is worth 200 weeks of compensation. Loss in one ear is worth 52 weeks. Partial loss is a proportional fraction of those totals.
The percentage of impairment is not improvised. It comes from the American Medical Association Guides to the Evaluation of Permanent Impairment. The audiologist measures hearing thresholds at 500, 1000, 2000, and 3000 Hz, averages the decibel levels for each ear, and applies the AMA formula. Every decibel of average loss above 25 dB counts as 1.5% monaural impairment, capped at 100% when the average reaches roughly 92 dB.
The two monaural figures combine into a binaural impairment using a weighted formula that gives the better ear five times the weight of the worse ear. That binaural percentage is then multiplied by 200 weeks. A worked example makes it concrete. Suppose the AMA calculation produces a 12% binaural impairment. Multiply 12% by 200 weeks and the contractor is owed 24 weeks of compensation at two-thirds of his average weekly wage.
Two factors push the award up. Tinnitus, the persistent ringing that so often accompanies noise damage, can add impairment under the AMA Guides. And the compensation rate depends on the contractor's average weekly wage at the time of injury, which for overseas contractors with hazard pay and uplift can be substantial.
The scheduled nature of the award is the strategic core. Because the value is fixed by statute once the impairment percentage is set, the entire fight collapses into two questions. What does the audiogram show, and whose audiogram controls. Employers routinely commission their own evaluation, and dueling AMA calculations are common. The reliability of the test, the calibration of the equipment, and the qualifications of the examiner all become litigable. Reaching maximum medical improvement matters here too, because the schedule measures permanent impairment, not a loss that might still be changing.
Which employer and carrier are responsible when exposure spanned multiple jobs?
The mechanic in our scenario worked for three different contractors over six years. Every one of them ran equipment that damaged his hearing. So who pays.
The Longshore Act answers with the last injurious exposure rule. The employer at the time of the last exposure that could have contributed to the disease bears the full liability. Not a share. The full award. The rule exists precisely so claimants are not forced to litigate apportionment across a string of employers and insurers. It lands the liability on one party and lets that party sort out contribution privately.
That rule sounds clean until you apply it to a contractor's chaotic employment history. The last injurious exposure is the last employment that exposed the worker to noise capable of causing or worsening the loss, even briefly. A two-week assignment running generators can make a contractor the responsible employer for a decade of accumulated damage at prior jobs. This is the inverse of the apportionment problem that surfaces in concurrent employment situations where a contractor held multiple jobs at once.
The date of injury for an occupational disease adds another layer. For hearing loss, the date is generally fixed by the date of awareness, meaning when the contractor knew or should have known the loss was work-related. That awareness date often coincides with the first audiogram diagnosing the loss, which is why the audiologist's report does double duty as both the impairment measurement and the date anchor.
Now connect that to the carrier. The responsible carrier is whoever insured the responsible employer on the date of injury. Identifying the last injurious exposure tells you the employer. It does not tell you the carrier. DBA carriers shift over time. A contractor's insurer in 2014 may be different from its insurer in 2018, and the awarding agency may have mandated a specific carrier for a defined window. Matching the right policy to the right injury date is the hidden second half of every hearing-loss claim, and it is exactly the kind of temporal carrier puzzle that high-risk contractor employment patterns make harder.
What evidence wins an occupational hearing-loss claim?
A defensible hearing-loss file rests on four pillars. Miss any one and the claim weakens.
The first pillar is the audiogram itself. It must be performed on calibrated equipment by a qualified audiologist, and it should report thresholds at the AMA frequencies. A screening audiogram from a deployment medical kiosk rarely survives scrutiny. Get a clinical evaluation with a written AMA impairment rating.
The second pillar is the noise-exposure history. This is the narrative that connects measurable loss to covered employment. Job titles, equipment operated, proximity to the noise source, daily exposure duration, and the absence or inadequacy of hearing protection all belong in the record. A flight-line mechanic, an armament technician, and a power-generation operator each have a distinct exposure profile, and the file should reflect which one applies.
The third pillar is the employment and contract record. You need to establish that the noisy work happened under DBA-covered overseas employment, identify each employer in the sequence, and pin down which one provided the last injurious exposure. Contract numbers, places of performance, and dates of service turn a vague work history into a provable timeline. Conditions on the ground also matter, because base environments differ. The acoustic reality of a flight line is not the same as a detention facility or a fixed installation, and the exposure narrative has to match the assignment.
The fourth pillar is the legal precedent. Hearing-loss claims rarely break new ground, which is good news for claimants. The doctrines are settled. But the way a particular judge has handled audiogram disputes, the last injurious exposure rule, or the date-of-awareness question can shape how you frame your case. On-point decisions show you which arguments survived and which carriers were behind contested awards.
That last pillar is where most practitioners stall. Finding the on-point hearing-loss decisions, and seeing which carriers litigated them, requires sifting thousands of pages of Benefits Review Board and administrative law judge opinions. ClaimTrove indexes that corpus and lets you search it by injury type, employer, and carrier in seconds. Run a hearing-loss query and surface the decisions and the insurers that actually appear behind these awards, instead of reading PDFs one at a time.
What mistakes sink contractor hearing-loss claims?
Several recurring errors cost contractors money or sink their claims entirely.
The first is treating hearing loss as too minor to pursue. Because the contractor kept working, both he and an inexperienced representative may assume there is nothing to recover. The schedule says otherwise. A measurable binaural impairment is worth weeks of compensation regardless of lost time, and waiving it forfeits real value.
The second is relying on a screening audiogram. A pass-fail hearing check from a deployment health survey is not an AMA impairment rating. Without a properly conducted clinical audiogram and a written rating, there is no number to multiply against the 200-week schedule.
The third is missing the date-of-awareness clock. Occupational disease claims have filing deadlines that run from when the contractor knew or should have known the condition was work-related. A diagnosis sitting in a file for years without a claim can push the matter past the limitations period. The awareness date is both a sword and a hazard.
The fourth is naming the wrong responsible employer. Get the last injurious exposure analysis wrong and you may file against an employer or carrier that has a clean defense, while the truly liable party escapes. Worse, you may not realize the carrier changed between the exposure period and the injury date.
The fifth is ignoring the carrier-identification problem until late. Attorneys often build the medical and exposure case beautifully, then discover they cannot name the insurer that has to write the check. The responsible carrier is keyed to one employer on one date, and DBA carrier relationships shift across contracts and agency mandates. ClaimTrove resolves that by tracing the employer, the contract vehicle, and the time period to the carrier that was actually on the risk. Start your investigation there, identify the on-point decisions and the responsible carrier, and walk into the claim with the answer already in hand.