6Beatty L G,Prandoni J F.Underwater Sound transducer calibration facility for the 10 to 4000 Hz frequency range at hydrostatic pressure to 10,000 psig.AD693091.Naval Research Laboratory,1969:1-15.
7Piquette J C,Forsythe S E.Low-frequency echo-reduction and insertion-loss measurements from small passivematerial samples under ocean environmental temperatures and hydrostatic pressures.J.Acoust.Soc.Am.,2001;110(4):1998-2006.
8Tyutekin V V.Precision of the material parameter measurements in the acoustic low-frequency pipe.Acoustical Physics,2001; 47(6):843-852.
