APPENDIX C Plate Properties of Solidsa

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Material

cL,

m/s

            w,

kg/m3

MSfc,

Hz-kg/m2 _

E,

GPa _

Aluminum (2014) 5,420 2,800 34,090 0.001 73.1 0.33

Brass (red) 3,710 8,710 155,200 0.001 103.4 0.37

Brick 3,800 1,800 31,250 0.015 25.0 0.20

Chipboard 675 750 73,400 0.020 0.340 0.08

Concrete 2,960 2,400 50,200 0.020 20.7 0.13

Glass 5,450 2,500 30,300 0.0013 71.0 0.21

Granite 4,413 2,690 40,270 0.001 48.3 0.28

Gypsum board 6,790 650 6,320 0.018 29.5 0.13

Lead 1,206 11,300 819,000 0.015 13.8 0.40

LexanTM 1,450 1,200 54,650 0.015 2.12 0.40

Marble 4,600 2,800 40,200 0.001 55.2 0.26

Masonry block (6 in) 3,120 1,100 23,300 0.007 10.6 0.10

Plaster 4,550 1,700 24,700 0.005 32.0 0.30

PlexiglasTM 2,035 1,150 37,300 0.020 4.00 0.40

Plywood 3,100 600 12,780 0.030 4.86 0.40

Polyethylene 765 935 80,700 0.010 0.48 0.35

Pyrex 5,350 2,300 28,400 0.004 62.0 0.24

Rubber (hard) 1,700 950 36,900 0.080 2.30 0.40

Steel (C1020) 5,100 7,700 99,700 0.0013 200.0 0.27

Wood (oak) 3,860 770 11,900 0.008 11.2 0.15

Wood (pine) 4,680 640 8,160 0.020 13.7 0.15

acL is the longitudinal speed of sound; _w is the material density; MS ј _wh ј surface

density; fc is the critical or wave coincidence frequency, _ is the damping coefficient;

E is Young’s modulus; and  is Poisson’s ratio.

Copyright © 2003 Marcel Dekker, Inc.

Appendix D: Surface Absorption

Coe⁄cients

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