Table 1 Vibrational properties parameters of P. jezoensis
Extraction methods | Deionized water | Dichloromethane | Benzyl alcohol | Ethanol | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Parameters | Before | After | Relative change | Before | After | Relative change | Before | After | Relative change | Before | After | Relative change |
Density ρ(kg/m3) | 398 | 370 | -7.04% | 451 | 405 | -10.2% | 394 | 360 | -8.63% | 401 | 369 | -7.98% |
Dynamic modulus of elasticity EL (GPa) | 12.9 | 12.8 | -0.62% | 16.4 | 16.6 | 1.65% | 14.5 | 15.1 | 4.35% | 14.5 | 14.9 | 2.55% |
Specific dynamic elastic modulus EL/ρ (GPa) | 32.4 | 34.6 | 6.92% | 36.3 | 41.0 | 13.0% | 36. 6 | 41.9 | 14.5% | 36.2 | 40.4 | 11.6% |
Stiffness modulus GLR (GPa) | 0.68 | 0.70 | 2.94% | 0.76 | 0.78 | 2.63% | 0.61 | 0.63 | 3.28% | 0.63 | 0.64 | 1.59% |
Ratio of EL to GLR EL/GLR | 19.0 | 18.5 | -2.63% | 21.7 | 21.4 | -1.06% | 23.9 | 24.0 | 0.21% | 23.5 | 23.7 | 1.02% |
Acoustic radiation R (m4/kg·s) | 14.4 | 16.1 | 11.2% | 13.4 | 15.1 | 12.7% | 15.4 | 18.1 | 17.4% | 15.1 | 17.4 | 14.9% |
Acoustic impedance Z (MPa·s/m) | 2.26 | 2.18 | -3.54% | 2.71 | 2.60 | -4.06% | 2.39 | 2.33 | -2.51% | 2.41 | 2.34 | -2.90% |
Propagation velocity of bending vibration υL (m/s) | 5689 | 5882 | 3.39% | 6023 | 6409 | 6.41% | 6062 | 6479 | 6.88% | 6018 | 6352 | 5.55% |
Logarithmic decrement δL (%) | 0.40 | 0.36 | -10.0% | 0.44 | 0.31 | -29.6% | 0.65 | 0.31 | -52.3% | 0.59 | 0.57 | -3.39% |
Sound transmission parameter υL/δL (105 m/s) | 14.1 | 16.4 | 16.5% | 13.8 | 20.6 | 48.9% | 9.26 | 20.7 | 124% | 10.2 | 11.2 | 9.19% |
Acoustic conversion efficiency υL/(δL·ρ) | 3542 | 4441 | 25.4% | 3071 | 5088 | 65.7% | 2350 | 5761 | 145% | 2551 | 3027 | 18.7% |