Specifications

The following formula gives the pressure ratio p(h) (wrt to the on-axis pressure) for

any off-axis angle of a regularly spaced linear array:

Far field polar patterns can be quite complicated - even for a simple pair of

subwoofers driven in unison.

Wide spacing will cause off axis irregularities (combing) because time offsets start to

become significant. See Section 4.10 for a more detailed explanation.

♦ An odd number of half wavelengths will cause nulls along the line of the

loudspeakers (the 90º lines) - see the 2½ wavelength example above.

♦ An even number of half wavelengths will cause lobes along the line of the

loudspeakers - see the 2 wavelength example below.

MARTIN AUDIO - APPLICATIONS GUIDE, WAVEFRONT COMPACT SERIES

CONTENTS

GUIDES

ENGLISH ONLY