AMCA 300:2014

Revised the microphone type from a free field to diffuse field type. Clarified that an aerodynamic performance test is necessary to determine the point of operation of the test subject. Revised the test procedure calculation assumptions from unenforceable language to a BV-3 vibration rating from AMCA 204.Clarified that unweighted fan sound power levels shall be reported in each band with the accuracy of not more than one decimal place. Added a missing reference to equations used to calculate the end correction for a round duct terminated in a large wall. Revised the tables used to find the end correction factor for ducts terminating in a large space to agree with text.