Hml Method - Castle group dBAir Operating Manual

HML Method

The second most accurate method to calculate hearing protection data and one that
does not require octave band analysis, however the data file must be recorded using
the following Frequency Weightings: -
• Measurement 1 = 'A' Weighting
• Measurement 2 = 'C' Weighting
Scroll the available manufacturers using the Up or Down Arrow keys or by page using
the Left or Right Arrow keys, press the OK key to select the highlighted option and
show the calculated protection level for each model of the manufacturer.
Alternatively select All to show the calculated hearing protection for each model of all
the manufacturers.
The selected manufacturer number and the total number of available manufacturers
are listed in red.
Hearing protection models are shown alongside the calculated assumed protection
value. The listing is in order showing the lowest assumed protection value first.
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