Material Z: MRayl VL: m/s VS: m/s Density: kg/m3 Attn: dB/cm/MHz Type Vendor Polyurethane, RP-6400 1.56 1500 1040 Rubber REN Polyurethane, RP-6410 1.55 1490 1040 15.75 Plastic REN RTV-30 1.41 9700 1450 3.5 Rubber GE RTV-77 1.36 1020 1330 4 Rubber GE Ecothane CPC-39 1.63 1530 1060 Rubber EC Acrylic, Plexiglas 3.08 2610 1180 2.48 Plastic Rohm Acrylic, Clear 326 2750 1190 1.28 Plastic Rohm Cellulose Butyrate 2560 2140 1190 4.4 Plastic Delrin, Black 3.45 2430 1420 6.1 Plastic D Ethyl vinyl acetate(28%) 1.6 1680 950 Plastic USI Nylon, black 3.15 2770 1140 0.6 Plastic Parylene C 3.15 2.77 1140 0.1 Plastic MM Polycarbonate, balck 2.77 2270 1220 4.4 Plastic GEP Polycarbonate, blue 2.72 2260 1200 4.61 Plastic Mobay Polycarbonate, clear 2.69 2270 1180 4.5 Plastic PORT Polyethylene, low density 1.79 1950 540 920 0.48 Plastic USi Polypropylene, white 2.36 2660 890 3.84 Plastic PORT Polystyrene, styron 666 2.52 1400 1150 1050 0.36 Plastic E PVC,grey 3.27 2380 1380 2.24 Plastic PORT Vinyl,Rigid 2.96 2230 1330 2.56 Plastic Alumina 40.6 10520 3860 Metal Beryllium 24.1 12890 8880 1870 Metal Bismuth 21.5 2200 1100 9800 Metal Boron carbide 26.4 11000 2400 Ceramic Boron nitride 9.88 5030 3860 1965 compound Brass 40.6 4700 2100 8640 Metal concrete 8 3100 2600 Mix Copper 44.6 5010 2270 8930 Metal Epotek301 2.85 2640 1080 Epoxy glass 11.4 5100 2800 2240 Mix glass-flint 16 4500 3600 Mix glass-quartz 12.1 5500 2200 Mix Glucose 5 3200 1560 Mix Gold 63.8 3240 1200 19700 Metal Granite 17.6 6500 2700 2707 Mix Iron 46.4 5900 3200 7690 Metal Lead 24.6 2200 700 11200 Metal Marble 10.5 3800 2800 Mix Nickel 49.5 5600 3000 8840 Metal Platinum 69.8 3260 1730 21400 Metal Porcelain 13.5 5900 2300 Mix Rubidium 1.93 1260 1530 Mix Salt 10.37 4780 2170 compound Sapphire 44.3 11.1 6040 3990 Mix Scotch tape 2080 1900 1160 Mix Sillicon 19.7 8430 5840 2340 Crystal Sillicon carbide 42 13060 7270 3217 Crystal Sillicon nitride 36 11000 6250 3270 Crystal Silver 38 3600 1600 10600 Metal Silver epoxy, e-solder 3022 5.14 1900 980 2710 8 Metal Slate 13.5 4500 3000 Mix Sleel stainless 45.7 5790 3100 7890 Metal Sulphur 2.7 1350 2000 Tantanlum 54.8 4100 2900 16600 Metal Teflon 2.97 1390 2140 0.78 Plastic Tin 24.2 3300 1700 7300 Metal Titanium 27.3 6100 3100 4480 Metal Titanium carbide 42.6 8270 5160 5150 Ceramic Tungsten 101 5200 2900 19400 Metal Uranium 63.8 3400 2000 18500 Metal Zinc 29.6 4200 2400 7000 Metal Zinc Oxide 36.4 6400 2950 5680 Metal Zirconium 30.1 4650 2250 6480 Metal Water 25 degree 1.494 14967 9980 Liquid Water 30 degree 1.509 1509 1000 Liquid Water 60 degree 1.55 1550 1000 Liquid Water, sea at 25 degree 1.569 1531 1025 Liquid Oil, olive 1.32 1445 918 Liquid Mercury at 25 degree 19.58 1450 13500 Liquid matching 3 pvc grey 3.27 2380 peek 5 plastic rtv 15 dd dd dd dd water 25 1.494 14967 9980 liquid tetst 1.56 1500 1040