8 hours TWA value is calculated as the cumulative volume conversions, as the average altitude: 8 hours of audio at a time, so the value of the calculated hours TWA8 must not exceed 90 DB a.
The TWA 8 hours is calculated by converting the accumulated volume to an average noise level in 8 hours, so the calculated TWA8 hours must not exceed 90 decibels.
The TWA 8 hours. The calculation quantity is converted into the volume of the sound collection means lost in the time 8 hours so value. TWA8 hours. The calculation must not exceed 90 DBA.