23 June 2009
UAM 2009,  Nafplion, Greece
3
Industrial Engineering Dept.
University of Parma – Italy
Advanced Industrial Design in Acoustic
Hydrophones
•Aquarian Audio H2a-XLR” hydrophone (www.aqaud.com):
•low-cost;
•small dimension (25mm x 46mm);
•wide range of employment (10 Hz ÷ 100 kHz);
•easily interfaced with commercial audio devices (+48V phantom power required).
•Acoustic characterization (air):  B&K 4189  Vs  H2a-XLR:
–Test signal:  Linear sine sweep (0.5 ÷ 5 kHz);
–H = H(Amplifier + Speaker + Medium + Transducer)
–Frequency responses are comparable!
The first step of these tests was anali