A Study of Off Axis Amplitude Response Due to Physical Transducer Separation

Aaron Lutzo, Student at the University of Toledo

Philadelphia, Pennsylvania


  1. Abstract

As an acoustic transducer reproduces a sound, the pressure wave it creates propagates into free space. If there are two transducers located near each other playing a similar frequency, the wave fronts will experience a constructive and destructive interference pattern. More often than not this is a detrimental phenomenon when designing a loudspeaker. The following paper explored this and different configurations of transducers and filters that can optimize a speaker looking for a “smooth” off axis response. It was determined that by controlling the driver separation or their crossover frequency, as well as their orientation to each other, off axis response variation could be greatly reduced and optimized.

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