•The authors want to express their gratitude to:
•
•the company WASS
(Whitehead Alenia Sistemi Subacquei) ( http://www.wass.it ) that has supported this research supplying
transducers and electronic equipment, and advising the authors in the choice
of transducers.
•
•Dr. Michele Zanolin
(Embry-Riddle Aeronautical University – Prescott (AZ)), who attended some of
the measures and provided the sound source used in the characterization of the
array.