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| Àâòîðèçàöèÿ |
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| Ïîèñê ïî óêàçàòåëÿì |
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| Beranek L.L. — Acoustics |
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| Ïðåäìåòíûé óêàçàòåëü |
Decay of sound, in rooms 293—295 304—311
Decay of sound, rate of 304—305
Decibel, conversion tables 455—463
Decibel, definition 12
Density, air, definition 7 10
Density, air, formula 10 39
Density, air, normal 10
Density, air, variational 23
Density, building materials 328
Density, flux 186 214 230 266
Density, metals 197
DI (directivity index), calculation 109—115
DI (directivity index), definition 109
DI (directivity index), sources 92 95 97—98 100 102 104—105 107 112—114
Diameter, effective, of diaphragms 215 231
Diaphragms, behavior 199—201
Diaphragms, constants 214—215 228—231
Diaphragms, design 199—202
Diaphragms, diameter, effective 215 231
Diaphragms, measurement 228—231
Diaphragms, stiffness-controlled 130
Diaphragms, unflanged 148
Diaphragms, velocity 187 199 224—225
Diffraction, case of sound-level meter 373—374
Diffraction, human being 373—374
Diffraction, long-tube 103
Diffraction, microphones 157 180 372
Diffuse sound field 298
Dipole source see "Doublet"
Direct sound 311 317 320—321
Direct speech 409
Direct-radiator loudspeakers 183—207
Direct-radiator loudspeakers, advantages 183
Direct-radiator loudspeakers, baffle 210—258
Direct-radiator loudspeakers, baffle, finite 210—211
Direct-radiator loudspeakers, baffle, infinite 210
Direct-radiator loudspeakers, bass-reflex 239—258
Direct-radiator loudspeakers, box-enclosed 211—228
Direct-radiator loudspeakers, coaxial 202—203
Direct-radiator loudspeakers, construction 183—184
Direct-radiator loudspeakers, diaphragm 198
Direct-radiator loudspeakers, disadvantages 183
Direct-radiator loudspeakers, divided-cone 201
Direct-radiator loudspeakers, duocone 201
Direct-radiator loudspeakers, element sizes 214—216
Direct-radiator loudspeakers, examples 194—195 207 231—239
Direct-radiator loudspeakers, measurement of elements 228—231
Direct-radiator loudspeakers, multiple 259—260
Direct-radiator loudspeakers, response 198 203—204
Direct-radiator loudspeakers, response, axial 203—204
Direct-radiator loudspeakers, response, transient 205
Direct-radiator loudspeakers, subjective judgments 205
Direct-radiator loudspeakers, triaxial 202—203
Direct-radiator loudspeakers, unbaffled 209—210
Directional microphones, arrays 93—96
Directional microphones, diaphragm 117—128
Directional microphones, directivity as related to sources 378—379
Directional microphones, doublet 148
Directional microphones, ribbon 178—182
Directivity characteristics 91
Directivity characteristics of loudspeakers 202—203
Directivity characteristics of microphones 148 150 181
Directivity characteristics, relation between microphones and loudspeakers 378—379
Directivity factor 109—112 317 319 321
Directivity index see "DI"
Directivity of transducers 378—379
Directivity patterns 91—108 114
Directivity patterns, aircraft, fans 344
Directivity patterns, free disk 103—105
Directivity patterns, speech, voice 343
Directivity, measurement of 365—369
Directivity, noise-control 334 342—344
Directivity, sources of 91—115 316—319
Disk, free, directivity patterns 103—105
Disk, radiation impedance 128
Dispersion of sound 25
Displacement, eardrum 389
Displacement, microphone 159 168
Displacement, particle 5 7 23 39
Displacement, transducer 72
Distortion, horn 272—276
Distortion, large-amplitude waves 272—274
Distortion, loudspeaker 205—206 252—253
Distortion, microphone 173
Distortion, nonlinear 173
Distortion, transient 205—206
Doors, transmission loss 349—350
Doublet, microphone 148
Doublet, source, piston without baffle 103—105
Doublet, source, simple 97—100
Draperies 300
Driving units see also "Direct-radiator loudspeakers"
Driving units, circuit for 262
Driving units, construction 261
Driving units, divided-cone 201
Driving units, typical 260—261
Ducts, attenuation in 350—353
Dynamic loudspeaker see "Direct-radiator loudspeakers"
Dynamic microphone 151—157 363
Ear, anatomy 390—394
Ear, canal 390
Ear, critical bandwidths 334 365—366 393—394 406
Ear, differential sensitivity 403—404
Ear, loudness 401—403
Ear, loudness level 398—401
Ear, masking 404—406
Ear, pitch 397—398
Ear, thresholds 394—307
Ear, transfer function 401
Eardrum 389—390
Earphone, moving-coil 88
Echoes 427
Effective length of tube, flanged 132—133
Effective length of tube, unflanged 133
Effective particle velocity 10
Effective sound pressure 9
Effective volume velocity 10
Efficiency, loudspeakers, maximum power available 190—193 195—198 262—265
Efficiency, reference 193—194
Electromagnetic loudspeakers 183—207
Electromagnetic microphones 151—157
Electromagnetic-mechanical transducers 70—71 84—85
Electromechanical transducers 70—75 86—90
Electrostatic microphones 157—164
Electrostatic-mechanical transducers 71—75 85—86
Elements of circuits, acoustical 62—69 128—143
Elements of circuits, compliance, acoustic 129—131
Elements of circuits, general 48—50
Elements of circuits, mass, acoustic 131—133
Elements of circuits, mechanical 51—62
Elements of circuits, radiation 116—128
Elements of circuits, resistance, acoustic 133—136
Elements of circuits, transducers 70—77
Elements of circuits, transformers, acoustic 139—142
Enclosures, bass-reflex 142—143 239—258
Enclosures, box 114 211—228
Enclosures, large irregular 298—331
Enclosures, loudspeaker 208—258
Enclosures, rectangular 286—297 330
Enclosures, sound in 28—35
Enclosures, steady-state behavior 291—294
Enclosures, transient behavior 291—295
Enclosures, tube 28—35
End corrections, closed-box 217—218
End corrections, flanged-tube 132—133
End corrections, free-tube 133
Energy density, definition 11—12
Energy density, example 45
Energy density, general equation 40
Energy density, kinetic 40
| Energy density, plane waves 40—43
Energy density, potential 40
Energy density, rooms 298
Energy density, spherical waves 43
Energy density, steady-state sound 311—314
Energy flux see "Intensity"
Energy, air-gap 206
Energy, dissipated 80—82
Energy, kinetic 40
Energy, potential 40
Energy, stored 80—82
Engine noise 340
Equal-loudness contours 399—400
Equations, acoustical, general 39
Equations, Eyring — Norris 306
Equations, horn 269—273
Equations, microphone 145 148 150
Equations, reciprocity 382—384 387
Equations, reverberation 306
Equations, room 298—429
Equations, transducer 83—88
Equations, wave 16—23 39
Equations, wave, solutions to 23—39
Expander plates 166—170
Exponential connector 141—142
Exponential function 25
Exponential, horn 268—276 282 284
External ear 390
Eyring — Norris equation 306
Fans, ventilating 342 344
Far field 100—101
Feeling, thresholds of discomfort, tickle and pain 397
Fiberglas blanket 219
Fiberglas board 219
Fiberglas wedge 221
Field, sound, anechoic 22 229 278 394 409
Field, sound, diffuse 298
Field, sound, direct 311
Field, sound, far 100—101
Field, sound, free 22 36
Field, sound, near 100—101
Field, sound, reverberant 311
Filters, acoustic 143 353—360
Filters, electrical 333—334 362—365
Finite-sized baffle 210—211
Flanking transmission 359—360
Flare constant 270
Fletcher — Munson contours 399
Flow resistance 219
Fluctuating sounds, measurement 371—372
Fluctuations of sound in room during decay 293—294
Flux density, definition 186
Flux density, measurement 230
Flux density, typical, for loudspeakers 214 266
Folded horn 278—283
Force, equation of 17 39
Forced vibrations see "Steady state"
Forward-traveling wave 288—289
Free field, definition 22 36
Free field, reciprocity formulas 382—385
Free field, response, microphones 157 382—385
Frequency response, filters 353—360
Frequency response, loudspeakers 189—192 226—228 246—253
Frequency response, loudspeakers, horn 263—266
Frequency response, microphones 156 164
Frequency response, mufflers 353—360
Frequency response, sound-level meters 372—373
Frequency response, transducers 379—381
Frequency, analyzers 333—334
Frequency, critical 244—247
Frequency, definition 7 397
Frequency, differential sensitivity of ear 404
Frequency, normal 287
Frequency, resonance 215 229 244 263 286—287
Frequency, weighting 401
Friction in air 135 137
Fundamental, missing 404
Gas constants 19
Gas, adiabatic 19—20
Gas, Charles — Boyle law 18
General Radio Type 1551-A sound-level meter 374
Generators, acoustic 66—67
Generators, constant-force 56
Generators, constant-pressure 66
Generators, constant-velocity 55
Generators, constant-volume-velocity 66
Generators, loudspeaker see "Direct-radiator loudspeakers"
Generators, mechanical 55—56
Generators, table of 51
Generators, voice 338—343 407—408
Glass fiber blanket 219
Glass fiber board 219
Glass fiber wedge 221
Goatskin 202
Gradient microphones, general 146—150
Gradient microphones, ribbon 178—180
Gram-molecular weight 19
Graphic-level recorder 363
Grazing incidence sound 372
Harmonic distortion in horns 272—274
Harmonic distortion in loudspeakers 252—253
Harmonic distortion in microphones 173
Harmonic distortion in sound waves 272—274
Harmonic distortion, in gases 272—274
Hearing 388—406
Hearing, differential sensitivity 403—404
Hearing, ear 390—394
Hearing, loudness 398—403
Hearing, masking 404—406
Hearing, mechanism 388—389
Hearing, missing fundamental 404
Hearing, pitch 397—398
Hearing, thresholds 394—397
Helmholtz resonator 69
Hemispherical radiation 345
history 1
Horn loudspeakers 259—284
Horns, advantages 259
Horns, bends 278
Horns, cellular 107—108
Horns, conical 276—278
Horns, cross-sectional shapes 279
Horns, cutoff frequency 271
Horns, disadvantages 259—260
Horns, distortion, harmonic 272—274
Horns, distortion, nonlinear 272—276
Horns, equation 269
Horns, exponential 268—276
Horns, finite 272—276
Horns, flare constant 270
Horns, folded 278—283
Horns, high-frequency 282—284
Horns, hyperbolic 277
Horns, impedance 269—273
Horns, infinite 269—272
Horns, Klipsch 283
Horns, low-frequency 280—282
Horns, materials 280
Horns, mobility 264 270—271
Horns, mouth 259 268
Horns, multicellular 107—108
Horns, parabolic 276
Horns, throat 259
Horns, typical 280—284
Humidity, effects of, on microphones 151 157 167 174 370
Humidity, effects of, on sound propagation 308—311
Huygens wavelets 93
Hydrostatically sensitive microphones 167 170 175 177
Impedances at discontinuities 139—142
Impedances, acoustic see "Specific acoustic impedance"
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