Fischetti, Mark <br/><br/>
Directional sound. Psst... hey, you.  [electronic resource] 

 -  Scientific American  May 2007 
 - 96-7 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8733 
<br/><br/><label>Standard No.: </label>10.1038/scientificamerican0507-96  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humans<br/>Sound<br/>Sound Localization<br/>Ultrasonics