Hearing Conservation for
the Most Extreme Noise on Earth.
Jet engine test cells, flight line operations, and MRO hangars. Noise levels exceeding 140 dB. Defense requirements beyond OSHA.
0 dB
Peak test cell noise
Dual HPD
Often required
DoDI
6055.12 compliance
0+ yr
Record retention
Independent 1910.95 Audit
Third-Party Reviewed
FDA Registered
Class II Medical Device
SOC 2 Type II
AICPA Certified
HIPAA Compliant
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Made in USA
Engineered & Built
The Reality on the Line
Why Traditional Testing Fails in Aerospace
Standard HCP approaches weren't designed for extreme noise, security constraints, and defense regulatory requirements.
Jet Engine Test Cells Exceed 140 dB
Engine test cells and run-up areas generate noise beyond where even dual hearing protection provides adequate attenuation. The most extreme occupational noise exposure in any industry.
MRO Hangar Reverberation
Large enclosed hangars amplify riveting, grinding, and pneumatic tools by 5–15 dB above open-air levels. Area monitoring significantly underestimates actual worker dose.
DoD Requirements Exceed OSHA
DoDI 6055.12 requires hearing readiness tracking, deployment audiograms, and DOEHRS integration. Civilian OSHA compliance alone doesn't satisfy defense contractor obligations.
Communication-Critical Roles Limit HPD
Flight line directors and ground control need to communicate in extreme noise. Active HPD systems require fit verification and calibration. Wrong HPD choice = safety + compliance risk.
Built for Your Operations
How Soundtrace Fits Into Aerospace & Defense
Test Across Flight Lines & Hangars
6 min
per test
Portable testing in flight line shacks, hangar offices, or MRO break rooms. Test between sorties or during maintenance downtime.
Task-Specific Noise Monitoring
Per task
exposure mapping
Dosimeters capture actual exposure by task: engine run-up, riveting, grinding, flight line marshaling. Exposure profiles mapped to job classifications.
Verify Advanced HPD Systems
All HPD
types verified
Quantitative fit testing for passive and active hearing protection. Verify communication headsets, tactical earpieces, and level-dependent systems.
Defense-Grade Record Retention
30+
year retention
30+ year records with audit trails and DOEHRS-compatible exports. Every audiogram linked to noise exposure data and HPD fit results.
Know Your Exposure
Noise Levels Across Aerospace Operations
From test cells at 140+ dB to composite manufacturing at 85 dBA — every area needs its own strategy.
Requires double hearing protection minimum
Reverberant enclosed space
How Loud Is That?
60 dB
Normal conversation
85 dB
OSHA action level
110 dB
Rock concert
140 dB
Gunshot
OSHA ITA Data
Hearing Loss Trends in Air Transportation (NAICS 481)
OSHA Injury Tracking Application (ITA) reported hearing loss cases across 39 air transportation companies, 2016–2024.
39
Companies
Across air transportation
3,969
Total HL Cases
2016–2024 combined
0.55%
Avg Injury Rate
Cases ÷ employees
Who We Serve
Types of Companies in Aerospace & Defense
Military and commercial aircraft MRO performing heavy maintenance, engine overhaul, and structural repair in enclosed hangars
Jet engine test and overhaul operations with test cell workers, instrumentation technicians, and quality inspectors
Defense contractors manufacturing airframes, weapon systems, and avionics with DoDI 6055.12 requirements
Commercial aerospace manufacturing with large-scale composite layup, machining, and assembly across multi-building campuses
Go Deeper
Aerospace & Defense Resources
Related Features
On-site testing for flight line, hangar, and test cell crews
Task-specific dosimetry for extreme noise environments
Verify passive and active HPD system performance
Defense-grade 30+ year digital record retention
Hearing loss data by industry and NAICS code
Mission-Ready Hearing Conservation.
From Test Cell to Flight Line.
See how Soundtrace handles extreme-noise hearing conservation — OSHA, DoDI 6055.12, and contractor audit ready.