362 Subject index
Shape function, 230
Single number rating, 211
Snell’s law, 82, 205
Sound
airborne, 207
structure borne, 207
Sound intensity, 62
Sound power, 61
level, 63
Sound pressure level, 1, 57
Sound reduction index, 208
apparent, 210
flanking, 345
weighted, 211
Source
dipole, 220
monopole, 219
Source strength, 66
Specific acoustic impedance, 58
Specific airflow resistance, 197
Specific heat capacity, 190
Spectral adaptation term, 213
Spherical wave, 59
Standardized level difference, 211
Standing wave tube, 79, 155, 161
Standing waves, 83
Statistical energy analysis, 265
Stiffness controlled, 43
Structure factor, 189
Studs
steel, 294
wooden, 295
Surface impedance, 75
Suspended ceiling, 325, 336
Swept sine signals, 25, 26, 29
Tapping machine, 215, 306
Thermal conductivity, 190
Thermal length, 191
Tortuosity, 189, 199
Trace matching, 222
Transfer function, 31, 33
Transfer impedance, 37
Transfer matrices, 202
Transfer matrix method, 164
Transmissibility, 37, 45
Transmission factor, 208, 304
Transmission loss see Sound reduction
index
Transmission path, 211
Vibration isolation, 39, 50
Vibration reduction index, 348
Viscoelastic layer, 237
Viscous length, 191
Viscous skin depth, 199Waterhouse correction, 120, 210
Wave
bending, 89
dispersive, 90
longitudinal, 86
quasi-longitudinal, 87
shear, 88
Wave equation, 56
Wave number, 56
modal, 98
bending, 300
Wavelength, 57