Subject index 361
tangential, 110
Modulus of elasticity, 87, 317
Moment impedance, 37
Moment mobility, 37
Monopole source, 64
Multipole sources, 66
Natural modes, 49, 52, 93
Near field, 70
bending wave, 235, 287, 308
Nodal
point, 111
surface, 111
Nyquist frequency, 14
Orthotropic, 89, 303
Orthotropic plate, 93, 251
Oscillatory motion, 1
Periodic binary sequence, 28
Periodic signal, 8
Permeability, 197
Phase coefficient, 60
Pink noise, 25
Piston source, 69
Plane wave, 57
Plastic foam, 156
Plenum (cavity)
damped, 341
undamped, 337
Point impedance see Driving point
impedance
Poisson process, 142
Poisson’s ratio, 87
Polyester fibres, 157
Polyurethane foam, 304
Pore shape factor, 190
Porosity, 198, 317
Power attenuation coefficient, 122, 339
Power spectral density function, 14
Power spectral density, 35
Power spectrum see Power spectral
density
Power transfer coefficient, 266
Prandtl number, 190
Precedence effect see Haas effect
Pressure reflection factor, 74
Pressure release surface, 77, 167
Primitive root sequences, 139
Principle of reciprocity, 72
Principle of superposition, 31, 47
Probability density, 23, 142
function, 23
Propagation coefficient, 60, 82, 190,
328
Pseudo stochastic, 2, 25Q factor, 41
Quadratic residue sequences, 139
Quantization, 14Radiation efficiency see Radiation
factor
Radiation factor, 66, 73, 218, 293
Radiation impedance, 72
Radiation index, 219
Rayl, 197
Rayleigh integral, 68
Rayleigh model, 178
Ray-tracing method, 134
Real time analyser, 17
Reciprocity
principle, 85, 243, 257
vibroacoustic, 85
Reference curve, 212
Reflection factor
pressure, 160
Relaxation phenomena, 122
Repeatability, 133
Reproducibility, 133
Resonator
Helmholtz, 164
Reverberation room, 119, 155, 163
Reverberation time, 41, 107, 351
Ring frequency, 336
RMS-value, 6
Room constant, 120
Room radius, 126Sabine’s formula, 121
Sampling, 14
Sampling frequency, 16
Sandwich element, 277, 298
Scattering coefficient, 138
Scattering cross section, 142
Schroeder cut-off frequency, 116