Abstract
A four-microphone orthogonal array is used to determine the acoustic pressure and the three components of acoustic velocity over the range of 300–3000 Hz. Signals are squared and summed to produce potential, kinetic, and total energy density. The three components of the intensity vector can also be determined. The device has been designed for the study of and improved measurements in reverberant and partially reverberant sound fields. Some preliminary measurements in a reverberation room will be presented. [Work supported by IBM Corp., Communications Products Div., Austin, TX.]
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