Interspeech'2005 - Eurospeech
This paper presents a method of steering audible sound beams generated by parametric arrays in air. A hybrid system consisting of combined electronic / mechanical phased array technique is used. Although commercially available emitter technology has been used and therefore several guidelines known from prior-art phased arrays could not be realized, sufficient beam steering performance has been reached.
Bibliographic reference. Olszewski, Dirk / Prasetyo, Fransiskus / Linhard, Klaus (2005): "Steerable highly directional audio beam loudspeaker", In INTERSPEECH-2005, 137-140.