101.8 hearing loss cases per company. Across 39 Air Transportation companies in nine years of OSHA data, the average employer recorded nearly 102 hearing loss cases — nearly seven times the next-highest industry. And the trend line is unlike anything else in the dataset: a dramatic 75% decline from 2016 to 2023, followed by a 2024 uptick that raises urgent questions.
Soundtrace analyzed nine years of OSHA ITA hearing loss data across 21,120 U.S. establishments. Air Transportation’s extreme per-company case concentration, its unique declining trend, and its 2024 reversal make it one of the most analytically interesting industries in the dataset. Part of our ongoing industry-by-industry deep dive series.
The Most Concentrated Industry in the Dataset
Every other major industry in the Soundtrace dataset is built from hundreds or thousands of reporting companies. Food & Beverage: 1,172. Transportation Equipment: 811. Air Transportation: 39. The entire industry’s nine-year hearing loss profile is generated by fewer than 40 employers. The two largest companies alone account for roughly 80% of all industry cases.
across 39 Air Transportation employers
Compare: Food & Beverage 13.3 • Transportation Equipment 14.7
When an industry has 39 companies producing nearly 4,000 hearing loss cases, the conversation is not about industry norms. It is about specific enterprises, specific programs, and specific leadership decisions.
The Noise Profile: What Airline Workers Actually Face
Ramp workers frequently remove hearing protection to communicate via radio, then replace it inconsistently. Communication-compatible hearing protection — devices that attenuate hazardous noise while passing speech-range frequencies — is a technical requirement, not just a preference, in operations where communication failures have safety consequences beyond hearing loss.
The Remarkable Nine-Year Decline — and Why It Happened
From a peak of approximately 950 cases in 2016, Air Transportation declined every single year through 2023, reaching a low of roughly 175 cases — an 82% reduction. This decline began years before COVID and continued through the pandemic.
The most likely drivers of the sustained decline: fleet modernization toward quieter engine technology, union-driven hearing protection compliance programs at major carriers, ramp process redesigns reducing worker dwell time in extreme noise zones, and gate electrification eliminating GPU noise.
Air Transportation’s sustained nine-year decline is one of the most compelling real-world demonstrations that occupational hearing loss is genuinely preventable when an industry makes consistent, multi-pronged investments in engineering controls and program quality. The question for every other high-volume industry is why their trend lines don’t look the same.
The 2024 Uptick: Cause for Concern?
After seven consecutive years of decline, 2024 partial-year data shows Air Transportation reversing course. With approximately 285 cases through August 2024, the annualized projection suggests the full year may come in near or above 400 cases — roughly double the 2023 low of 175. The honest answer is it is too early to determine whether this represents a genuine reversal or a statistical artifact of the small-sample nature of this dataset. Post-pandemic workforce surges, deferred testing backlogs, and ITA reporting population shifts are all plausible explanations.
What a Strong Aviation Hearing Conservation Program Requires
- Communication-compatible hearing protection is non-negotiable. Standard foam earplugs are not an acceptable solution for ramp workers who must communicate during high-noise operations. The behavioral barrier that causes workers to remove HPDs to communicate is the primary compliance failure point in aviation.
- Dynamic noise exposure monitoring for variable ramp positions. Standard area monitoring misses the exposure variability of ramp workers who move between gate positions, baggage areas, and ground equipment staging throughout a shift.
- Baseline audiogram discipline for rapid-hire ramp expansions. Post-pandemic hiring surges at major carriers created enrollment management challenges. Any worker in a noise-hazardous role without a compliant baseline audiogram is both a compliance and liability exposure.
- Longitudinal records for long-tenure mechanics. Aircraft mechanics often spend entire 30+ year careers in noise-hazardous environments. Employer-controlled, cloud-based systems that do not depend on vendor continuity are the only reliable architecture for multi-decade records.
Frequently Asked Questions
Air Transportation has only 39 companies in the dataset but 3,969 total cases over nine years. The industry is structurally concentrated: a small number of large carriers each employ tens of thousands of workers exposed to jet engine and ground equipment noise. The two largest companies alone account for roughly 80% of all industry cases.
The most likely drivers: fleet modernization toward quieter engine technology, union-driven hearing protection compliance programs, ramp process redesigns reducing dwell time in extreme noise zones, and gate electrification programs eliminating GPU noise. The sustained multi-year decline is one of the strongest demonstrations in the dataset that occupational hearing loss is genuinely preventable.
Yes. OSHA 29 CFR 1910.95 applies to all Air Transportation employers where workers are exposed at or above 85 dBA TWA. This covers ramp agents, aircraft mechanics, ground equipment operators, and cargo handlers. Flight crew have separate requirements under FAA regulations.
Is your airline or MRO in this dataset?
Soundtrace has nine years of OSHA ITA hearing loss data across 39 Air Transportation companies. We can tell you where your operation ranks — and what the 75% decline leaders did differently.
Contact us to find out- Transportation Equipment Manufacturing’s Hearing Loss Problem Is Hidden in Plain Sight
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- OSHA Hearing Conservation Program: The Complete Guide
- Workers’ Compensation for Occupational Hearing Loss: 50-State Guide