The table below shows the AHRI 995-98 attenuation factors for radiated and discharge sound used in the Titus catalog.
To calculate room sound pressure from catalog sound power data, enter the catalog radiated or discharge sound power
for the 2nd through 7th octave bands and click "Calculate Radiated Room Sound Pressure" or "Calculate Discharge Room
Sound Pressure".
For Discharge Room Sound Pressure, the calculator uses the AHRI 885-98 discharge sound attenuation factors for airflow > 700 cfm (shown above). NC values for lower cfm's will vary slightly.