Directional sound

Ultimately, choosing a directional sound device depends greatly on the environment in which it is deployed as well as the content that will be reproduced.

Keeping these factors in mind will yield the best results through any evaluation of directional sound technologies.

The specific transduction method has no impact on the directivity of the resulting sound field; the analysis relies only on the aperture function of the source, per the Huygens–Fresnel principle.

The higher frequency sound waves have a shorter wavelength and thus don't spread out as rapidly.

[1] Phased array design is, however, sometimes useful for beamsteering, or for sidelobe mitigation, but making these compromises necessarily reduces directivity.