EAW WP Objective Analysis Of Loudspeaker Polar Response (c1994)
Conventional methods for calculating the beamwidth and Q of devices and systems appear questionable and incomplete when looking at measured polar data. Calculated beamwidth depends on the chosen method of nor- malizing the polar data and on a judgment of what response anomalies should be allowed inside and outside the area of coverage. Q is commonly referenced to a single measurement position on axis and it is therefore dependent upon device coverage angle. This obscures it’s usefulness as an indicator of the amount of excess and sometimes problematic sound radiated outside the intended coverage area.
Link for PDF: EAW WP Objective Analysis Of Loudspeaker Polar Response (c1994)