Page 64 - PowerPoint Presentation
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Time-weighted average (TWA)
• 85-dBA exposure limit and a 3-dB exchange rate
TWA = 10.0 x log (D/100) + 85
• 90-dBA exposure limit and a 5-dB exchange rate
TWA = 16.61 x log (D/100) + 90
Where D = dose
