DRIVE SIGNAL DISTRIBUTION FOR DIRECT FIELD ACOUSTIC TESTING

摘要

A direct field acoustic testing system provides an acoustic field having a higher degree of spatial uniformity. The system includes a control microphone, a controller, a combiner, and at least four acoustic transducers. The controller is operatively coupled to the control microphone such that the controller receives at least one input signal from the control microphone and provides at least four separately controllable controller output signals. The combiner combines the at least four separately controllable output signals to form at least four secondary output signals, each composed of combinations of one or more of the at least four separately controllable controller output signals. Each of the at least four transducers is operatively coupled to at least one of the at least four secondary output signals such that the output of the transducer varies in response to changes in at least two of the at least four separately controllable controller output signals.