## 4 Results and Discussion
### Attenuation Behavior of Organic Materials
& & dBm/MHz & dB/MHz/Hz & dB/MHz & factor & minus & mm & Mg/m \\ O1 & PMMA & 91 & 0.008 & 2.40 & 0.95 & 1.40 & 0.95 & TOM-1 Average \\ O2 & PVC & 224 & 224 & 0.019 & 2.33 & 45.775 & 1.40 & TOM-1 \\ O3 & PC & 638 & 638 & 0.053 & 2.25 & 2.176.5 & 1.20 & TOM-1 \\ O4 & Polytetra-normalized ethylene & 1471 & 1471 & 0.071 & 1.31 & 3.46.8 & 2.19 & TOM-1 \\ O5 & High density polyethylene & 446 & 446 & 0.022 & 2.59 & 24.2 & 0.91 & \\ O6 & Ultrainally molecular weight/TE & 256 & 256 & 0.025 & 2.40 & 1021.7 & 0.95 & TOM-1 \\ O7 & Polypropylene & 452 & 452 & 0.043 & 2.61 & 9.4 & 0.90 & \\ O8 & Nyron 68 & 269 & 269 & 0.026 & 2.67 & 2.73 & 1.14 & \\ O9 & Peavy & 274 & 274 & 0.028 & 2.75 & 9.1 & 1.39 & \\ O10 & Baseline & 312 & 312 & 0.029 & 2.50 & 9.3 & 1.36 & \\ O11 & Noepepne & 1297 & 1297 & 0.077 & 1.61 & 6.4 & 1.34 & \\ O12 & Red (\(\lambda\)) & 607 & 607 & 0.131 & 5.90 & 44.0 & 0.78 & 20 years \\ O13 & Red disk (\(\zeta\)R) & 2602 & 2602 & 0.174 & 1.80 & 37.8 & 0.78 & Same as O12 \\ O14 & Red disk (\(\zeta\)R) & 1597 & 1577 & 0.138 & 2.38 & 19.0 & 0.78 & Same as O12 \\ O15 & Red disk (\(\zeta\)R) & 2104 & 2104 & 0.177 & 2.30 & 17.3 & 0.72 & 10 years \\ O16 & Red disk (\(\zeta\)R) & 2182 & 0.184 & 2.30 & 85.773 & 0.72 & TOM-1 10 years \\ O17 & White disk (\(\zeta\)R) & 415 & 82.8 (n = 4) & 468 & 0.000 & 524 & 42.2 & 0.68 & 40 years \\ O18 & White disk (\(\zeta\)R) & 2667 & 2667 & 0.159 & 1.63 & 29.7 & 0.68 & Same as O17 \\ O19 & White disk (\(\zeta\)R) & 0 & 740 (\(\mu\)z = 2) & 760 & 0.241 & 18.7 & 0.68 & Same as O17 \\ O20 & Aromatic red color (\(\beta\)) & 707 & 707 & 0.066 & 2.56 & 7.4 & 0.53 & 20 years \\ O21 & Biech (\(\zeta\)) & 317 & 317 & 0.069 & 5.94 & 48.0 & 0.66 & 46 years \\ O22 & Biech (\(\zeta\)) & 1533 & 1533 & 0.123 & 2.19 & 15.0 & 0.66 & Same as O21 \\ O23 & Biech (\(\zeta\)) & 179 & 1719 & 1.353 & 2.43 & 20.0 & 0.66 & Same as O21 \\ O24 & Best (\(\zeta\)R) & 922 (n = 2) & 922 & [0.004] & 284 & 6.5 & 0.71 & \\ O25 & Cherry (\(\zeta\)R) & 366 & 366 & 0.074 & 5.53 & 38.3 & 0.58 & \\ O26 & Cherry (\(\zeta\)R) & 1842 & 1842 & 0.117 & 1.73 & 38.0 & 0.58 & Same as O25 \\ O27 & Cherry (\(\zeta\)R) & 635 & 17.2 (n = 4) & 652 & 0.54 & 2.34 & 18.9 & 0.58 & Same as O25 \\ O28 & Maple (\(\lambda\)) & 364 & 364 & 0.076 & 5.68 & 54.6 & 0.69 & 0.69 & Same as O28 \\ O29 & Maple (\(\zeta\)R) & 1228 & 1228 & 0.087 & 1.93 & 52.2 & 0.69 & Same as O28 \\ O30 & Maple (\(\zeta\)R) & 0 & 740 (\(\mu\)z = 2) & 747 & 0.059 & 2.15 & 27.0 & 0.69 & Same as O28 \\ O31 & Fine (\(\lambda\)) & 174 & 174 & 0.037 & 5.82 & 43.0 & 0.50 & 10 years \\ O32 & Pine (\(\beta\)) & 2863 & 2563 & 0.174 & 184 & 18.0 & 0.50 & Same as O31 \\ O33 & Popular (\(\zeta\)R) & 0 & 702 (\(\mu\)z) & 702 & 0.0591 & 2.15 & 6.2 & 0.88 & \\ O34 & Japanese red color (\(\lambda\)) & 452 & 452 & 0.104 & 6.26 & 36.6 & 0.39 & 30 years \\ O35 & Japanese red color (\(\zeta\)) & 3044 & 3044 & 0.272 & 2.44 & 11.5 & 0.39 & Same as O44 \\ O46 & Japanese red color (\(\delta\)R) & 1733 & 1733 & 0.155 & 2.44 & 27.7 & 0.39 & Same as O44 \\ O37 & Japanese cypress (\(\delta\)R) & 1465 & 1465 & 0.127 & 2.32 & 9.5 & 0.45 & \\ O38 & Palus  
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline
**Test** & **Material\({}^{*}\)** & **C\({}_{d}\)** & **C\({}_{a}\)\({}^{m}\)** & **Damping** & **Velocity** & **Thickness** & **Density** & **Notes** \\ \hline No.