Shuyu, L <br/><br/>
Equivalent circuits and directivity patterns of air-coupled ultrasonic transducers.  [electronic resource] 

 -  The Journal of the Acoustical Society of America  Mar 2001 
 - 949-57 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0001-4966 
<br/><br/><label>Standard No.: </label>10.1121/1.1342004  doi