Noise Exposure Calculator

OSHA and NIOSH dose estimates from dBA level and exposure duration

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Recommended Hearing & Welding PPE

Combine hearing protection with arc-rated PPE in noisy fabrication shops

Top Pick

ARCCAPTAIN 180 Panoramic Helmet

Eye and face protection during welding
Pair with hearing protection for full PPE
True-color lens for technique
Comfortable for long shifts
Essential in high-noise bays

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Measure

Fluke 62 Max IR Thermometer

General shop diagnostics
Non-contact checks near hot work
Compact field tool
Pairs with safety walk-throughs
Support equipment monitoring

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PPE

VASTOOLS welding accessories kit with gloves

VASTOOLS 6-Piece Welding Kit

Includes basic gloves and pliers
Baseline shop PPE bundle
Keep PPE accessible at noisy stations
Complements ear plugs or muffs
Everyday fabrication kit

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OSHA vs. NIOSH Noise Criteria

OSHA uses a 90 dBA permissible exposure limit with a 5 dB exchange rate — each 5 dB increase halves allowable time. NIOSH recommends an 85 dBA REL with a 3 dB exchange rate, which is more conservative and better aligned with hearing conservation research. Many employers follow OSHA for compliance but use NIOSH for best practice. This calculator lets you compare both so you understand why recommended protection differs between standards.

Understanding Noise Dose Percent

Dose expresses actual exposure as a percentage of the allowable full-shift exposure. 100% dose means you have reached the daily limit at that noise level. Combined exposures from multiple sources add as fractions: dose = (t₁/T₁ + t₂/T₂) × 100. A grinder at 95 dBA plus a welder at 88 dBA during the same period can exceed 100% even when neither alone seems extreme. Engineering controls — enclosures, distance, maintenance — reduce dose before PPE.

Typical Shop Noise Levels

Conversation is about 60 dBA. Angle grinders often measure 95–105 dBA at the operator position; plasma cutting and air arc gouging can exceed 100 dBA. MIG welding guns and power sources add 85–95 dBA depending on enclosure and duty cycle. Measure with a calibrated sound level meter at ear height during normal operation — do not guess from process type alone.

Selecting Hearing Protection

When dose exceeds 100% or levels exceed action thresholds, hearing protection is required. Choose earplugs or muffs with adequate Noise Reduction Rating (NRR), then apply OSHA derating (subtract 7 dB for muffs, 50% of NRR for plugs in many programs). Fit testing improves real-world attenuation. Use double protection when levels exceed 105 dBA. Hearing conservation programs also require audiometric testing and training — PPE alone is not sufficient.

Noise Exposure Calculator

Any trade

Contractor Job Estimator

Recommended Hearing & Welding PPE

ARCCAPTAIN 180 Panoramic Helmet

Fluke 62 Max IR Thermometer

VASTOOLS 6-Piece Welding Kit

OSHA vs. NIOSH Noise Criteria

Understanding Noise Dose Percent

Typical Shop Noise Levels

Selecting Hearing Protection

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