Noise was averaged by taking an ordinary mean of decibel values

If a report adds decibel readings and divides by the row count, its whole-period result may not represent an equivalent level. In this hypothetical situation brief loud events and long quiet intervals receive equal weight, although the instrument’s original export retains each interval’s duration.

What needs to be clarified

Check the equivalent-level calculation for the stated period, establishing what the input indicators mean, each interval’s duration and how incorrect averaging affects the acoustic report’s findings for the room.

Materials to prepare

Original instrument export with indicator names and time boundaries
Calculation table with formulas, excluded rows and totals
Measurement record with settings, calibration and event descriptions

What to compare

Determine whether rows contain interval equivalent levels, maxima or instantaneous samples. Check period continuity, time units and frequency weighting. For compatible intervals, calculate an energy average weighted by duration, handling gaps and excluded events separately; do not substitute maximum levels or sound exposure for interval equivalent levels.

Possible outcome of the analysis

Possible results include a reproducible recalculation and discrepancy table assessing its effect on the report; incompatible inputs may require new recording rather than an artificial average of the available values.

Limits of the conclusions

Correct arithmetic does not establish a representative observation period or noise source. Comparison with requirements also needs verification of the applicable indicator, conditions and recording completeness.