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2. Purpose of Noise Hazard Evaluation . Measurement of noise levels to determine if they are hazardous to hearingHazardous noise is defined as:> 85 dBA steady state noise over an 8 hour period>140 dBP impulse/impact noise. 3. Purpose of Noise Hazard Evaluation (cont.). To determine if noise hazards can be eliminated or reduced through engineering controls:Engineering controls should be the primary means of protecting personnel from hazardous noiseAll practical approaches to engineering nois9443
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