FLÄKT WOODS PRACTICAL GUIDE TO NOISE CONTROL Fläkt Woods Practical Guide to Noise Control Ian Sharland, B.Sc.(Eng.), C.Eng., A.F.R.Ae.S. with a foreword by Peter Lord, B.Sc., M.Sc.Tech., Ph.D., F.Inst.P., C.Eng., M.I.E.E., Professor of Acoustics, Salford University Published by Fläkt Woods Limited, Colchester, England. First Published May1972 Copyright Ian Sharland 1972 Second Impression 1973 Third Impression 1979 Fourth Impression 1986 Fifth Impression 1988 Sixth Impression 1990 Seventh Impression 1998 Eighth Impression 2001 Ninth Impression 2005 Printed in Great Britain by The Print Connection (UK) Ltd, Sudbury, Suffolk. Telephone +44 (0)1787 269821 Author’s Preface Contents Contents Index to figures and tables 1 2 Fläkt Woods Practical Guide to Noise Control Some fundamental concepts 3 4 Fläkt Woods Practical Guide to Noise Control Some fundamental concepts 5 6 Fläkt Woods Practical Guide to Noise Control Some fundamental concepts 7 8 Fläkt Woods Practical Guide to Noise Control Some fundamental concepts 9 10 Fläkt Woods Practical Guide to Noise Control Some fundamental concepts 11 12 Fläkt Woods Practical Guide to Noise Control Some fundamental concepts 13 14 Fläkt Woods Practical Guide to Noise Control Some fundamental concepts 15 16 Fläkt Woods Practical Guide to Noise Control Some fundamental concepts 17 18 Hearing and noise acceptability 19 20 Fläkt Woods Practical Guide to Noise Control Hearing and noise acceptability 21 22 Fläkt Woods Practical Guide to Noise Control Hearing and noise acceptability 23 24 Fläkt Woods Practical Guide to Noise Control Hearing and noise acceptability 25 26 Fläkt Woods Practical Guide to Noise Control Hearing and noise acceptability 27 28 Fläkt Woods Practical Guide to Noise Control Hearing and noise acceptability 29 30 Fläkt Woods Practical Guide to Noise Control Hearing and noise acceptability 31 32 Fläkt Woods Practical Guide to Noise Control Hearing and noise acceptability 33 34 Fläkt Woods Practical Guide to Noise Control Hearing and noise acceptability 35 36 Fläkt Woods Practical Guide to Noise Control 37 38 Fläkt Woods Practical Guide to Noise Control The measurement of acoustic properties 39 40 Fläkt Woods Practical Guide to Noise Control The measurement of acoustic properties 41 42 Fläkt Woods Practical Guide to Noise Control The measurement of acoustic properties 43 44 Fläkt Woods Practical Guide to Noise Control The measurement of acoustic properties 45 46 Fläkt Woods Practical Guide to Noise Control The measurement of acoustic properties 47 48 Fläkt Woods Practical Guide to Noise Control The measurement of acoustic properties 49 50 Fläkt Woods Practical Guide to Noise Control The measurement of acoustic properties 51 52 The calculation of noise levels 53 54 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 55 56 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 57 58 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 59 60 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 61 62 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 63 64 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 65 66 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 67 68 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 69 70 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 71 72 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 73 74 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 75 76 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 77 78 Fläkt Woods Practical Guide to Noise Control The calculation of noise levels 79 80 Calculation of noise in ventilating systems 81 82 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 83 84 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 85 86 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 87 88 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 89 90 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 91 92 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 93 94 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 95 96 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 97 98 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 99 100 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 101 102 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 103 104 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 105 106 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 107 108 Fläkt Woods Practical Guide to Noise Control Calculation of noise in ventilating systems 109 110 Fläkt Woods Practical Guide to Noise Control 111 112 Fläkt Woods Practical Guide to Noise Control Principles of noise control 113 114 Fläkt Woods Practical Guide to Noise Control Principles of noise control 115 116 Fläkt Woods Practical Guide to Noise Control Principles of noise control 117 118 Fläkt Woods Practical Guide to Noise Control Principles of noise control 119 120 Fläkt Woods Practical Guide to Noise Control Principles of noise control 121 122 Fläkt Woods Practical Guide to Noise Control Principles of noise control 123 124 Fläkt Woods Practical Guide to Noise Control Principles of noise control 125 126 Fläkt Woods Practical Guide to Noise Control Principles of noise control 127 128 Fläkt Woods Practical Guide to Noise Control Principles of noise control 129 130 Fläkt Woods Practical Guide to Noise Control Principles of noise control 131 132 Fläkt Woods Practical Guide to Noise Control Principles of noise control 133 134 Fläkt Woods Practical Guide to Noise Control Principles of noise control 135 136 Fläkt Woods Practical Guide to Noise Control Principles of noise control 137 138 Fläkt Woods Practical Guide to Noise Control Principles of noise control 139 140 Noise control in practice 141 142 Fläkt Woods Practical Guide to Noise Control Noise control in practice 143 144 Fläkt Woods Practical Guide to Noise Control Noise control in practice 145 146 Fläkt Woods Practical Guide to Noise Control Noise control in practice 147 148 Fläkt Woods Practical Guide to Noise Control Noise control in practice 149 150 Fläkt Woods Practical Guide to Noise Control Noise control in practice 151 152 Fläkt Woods Practical Guide to Noise Control Noise control in practice 153 154 Fläkt Woods Practical Guide to Noise Control Noise control in practice 155 156 Fläkt Woods Practical Guide to Noise Control Noise control in practice 157 158 Fläkt Woods Practical Guide to Noise Control Noise control in practice 159 160 Fläkt Woods Practical Guide to Noise Control Noise control in practice 161 162 Fläkt Woods Practical Guide to Noise Control Noise control in practice 163 164 Fläkt Woods Practical Guide to Noise Control Noise control in practice 165 166 Fläkt Woods Practical Guide to Noise Control Noise control in practice 167 168 Fläkt Woods Practical Guide to Noise Control Noise control in practice 169 170 Fläkt Woods Practical Guide to Noise Control Noise control in practice 171 172 Fläkt Woods Practical Guide to Noise Control Noise control in practice 173 174 Fläkt Woods Practical Guide to Noise Control Noise control in practice 175 176 Fläkt Woods Practical Guide to Noise Control Noise control in practice 177 178 Fläkt Woods Practical Guide to Noise Control Noise control in practice 179 180 Fläkt Woods Practical Guide to Noise Control Noise control in practice 181 182 Fläkt Woods Practical Guide to Noise Control Noise control in practice 183 184 Fläkt Woods Practical Guide to Noise Control Noise control in practice 185 186 Fläkt Woods Practical Guide to Noise Control Noise control in practice 187 188 Fläkt Woods Practical Guide to Noise Control Noise control in practice 189 190 Fläkt Woods Practical Guide to Noise Control Noise control in practice 191 192 Fläkt Woods Practical Guide to Noise Control Appendices 193 194 Fläkt Woods Practical Guide to Noise Control Appendices 195 196 Appendices 197 198 199 200 Fläkt Woods Practical Guide to Noise Control 201 201 202 Fläkt Woods Practical Guide to Noise Control 203 204 Fläkt Woods Practical Guide to Noise Control 205 206 Fläkt Woods Practical Guide to Noise Control 207 208 Fläkt Woods Practical Guide to Noise Control