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Strutt|Criteria|Ratings|Absorption|SAA calculates the sound absorption average for 1/3 octave band absorption coefficent data.

SAA is defined in ASTM C423-09a as: the average, rounded off to the nearest 0.01, of the sound absorption coefficients of a material for the twelve one-third octave bands from 200 through 2500 H inclusive

The absorption coefficients are rounded internally to the nearest 0.01 when performing the calculation.

• ASTM Standard C423-09a (2009), "Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method"