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Ohmic Audio

High-Output Audio Safety Workflow

Complete this card before a no-clip setup, high-output tuning session, demonstration, endurance test, or competition run. Use the full High-Output Audio Testing And Hearing Protection lesson for context.

1. Event And Authority

Vehicle / system / revision
Mode

☐ source/no-clip ☐ tuning ☐ demo ☐ competition ☐ endurance ☐ fault test

Test director / arm and abort authority
Operator / observer / safety support

2. People And Zone Map

Controlled vehicle zone
Warning / trained-observer zone
Public boundary and access control
Authorized people and PPE

3. Source And Test-Signal Contract

Source / app / device / file / generator
Waveform / frequency / spectrum / channels
Peak / RMS / crest factor / normalization
Ramp / on-time / off-time / repeats / duty cycle
Source → DSP → DAC → amplifier → load route
Maximum approved source and processing state

4. Exposure And Instrument Record

Exposure model

☐ NIOSH ☐ OSHA ☐ WHO recreational ☐ event / venue ☐ other

Criterion / exchange / threshold / integration period
Meter / mic / serial / calibrator / date
Weighting / detector / range / logging interval
Ear-position microphone coordinates
Competition sensor and score record — separate
Pre-calibration / post-calibration / drift
Overload, clipping, missing, or below-range intervals

5. Hearing Protection

Protector make / model / size / condition
Plug, muff, or combined fit notes
Glasses / hair / hat / cable / seal interference
Fit-test method / personal attenuation result
Communication / alarms / removal periods

6. System Limits And Stop Conditions

Source / DSP / DAC / limiter / mute limits
Amplifier voltage / current / load / clip / protection
Bus voltage / current / drop / battery / cable / fuse temperatures
Speaker / crossover / excursion / compression / temperature
Enclosure / port / glass / panel / trim / mounts / loose objects
Human exposure / public boundary / communication / symptoms

Abort immediately for: ☐ smoke ☐ odor ☐ arcing ☐ unexpected heat ☐ voltage collapse ☐ protection ☐ unplanned clipping ☐ mechanical noise ☐ structural movement ☐ person enters zone ☐ meter overload ☐ communication loss ☐ hearing symptom ☐ other: ____________

7. Run, Recovery, And Re-Entry

8. Result And Approval

Exposure result / dose / true peak
Competition or acoustic result
Electrical / thermal / mechanical result
First limiting mechanism
Symptoms / referral / follow-up
Approved operating envelope / revision / date
Next inspection or regression trigger
Test director approval

Medical note: this worksheet is educational. Sudden hearing loss requires immediate medical evaluation; persistent or repeated tinnitus, muffling, distortion, or speech difficulty warrants professional hearing evaluation.