3.79e-9 Ccush cm^5/dyne      Acoustic area=Pi*Sqr(3.5cm)
6.16e4   Rcush dyne-sec/cm^5
3.79e-9  Cskin cm^5/dyne       ( leak path length = 1 cm )
6.16e4   Rskin dyne-sec/cm^5  0.1   0.2   0.5    1.0    2.0    5.0    10     20(leak diameter mm)
8520     Lleak g/cm^4        2.0E1 5.0E0 8.0E-1 2.0E-1 5.0E-2 8.0E-3 2.0e-3 5.0e-4
1.07e7   Rleak dyne-sec/cm^5 7.3E5 4.6E4 1.2E3  7.3E1  4.6E0  1.2E-1 7.3e-2 1.2e0
95.1     Lcup g/cm^4     60 gram mass
0.186e-6  Ccup cm^5/dyne  7e-5:100cm^3 volume Vcup/RhoC2
2.17e4   Rmat
0.924    Lmat
8.19e-9  Cmat
 8.98E+0005	Rmat2
 1.36E+0000	Lmat2
 3.49E-0010	Cmat2
DH-132 tanker's helmet and triple flange earplug
USAARL Report No. 93-10, Jan 1993
Freq(Khz) Mean_Gain(dB) StDev_Gain(dB) Note: -10dB Gain = 10dB Attenuation
0.0625 -25.3  1.2
0.125  -32.0  5.3
0.250  -37.1  6.0
0.5    -40.2  5.4
1.0    -34.9  5.2
2.0    -34.0  4.8
4.0    -43.1  4.5
8.0    -47.4  6.0




