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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 |
Plywood 280
Point source 91—93
Polar diagram see "Directivity patterns"
Polarized sound wave 100—101
Porous materials 134 217—222 303—304 335—339 350—360
Port constants 240—241
Port, definition 239
Port, distortion 252—253
Port, size 242 255
Power levels, acoustic 14 361—369
Power levels, aircraft 342
Power levels, automobiles 339
Power levels, band 15
Power levels, definition 12 14—15
Power levels, electric 12
Power levels, engines 340
Power levels, machinery 338—340
Power levels, machinery, office 340
Power levels, orchestra 338
Power levels, propellers 341
Power levels, steam hose 341
Power levels, ventilating fans 342
Power levels, voice 338
Power, active and reactive 82—83
Power, dissipated 80—83
Power, efficiency 190—194
Power, efficiency, available 190—194 196 262—263
Power, loudspeaker 188
Power, source 109—112
Power, vector 82—83
Power-spectrum level 15 364
Pressure level 13 305 314—322 361—369
Pressure, ambient 7 9
Pressure, atmospheric 9
Pressure, barometric 9
Pressure, definitions 9
Pressure, differential sensitivity of ear 403
Pressure, doubling 141
Pressure, effective 9
Pressure, excess 8
Pressure, incremental 7 9
Pressure, instantaneous 9
Pressure, measurement 361—376
Pressure, microphones 144—177
Pressure, microphones, gradient 146—150 178—182
Pressure, plane wave 5 35
Pressure, rigidly closed tube 31—32
Pressure, sound 5 8 9 31—32
Pressure, spherical wave 36
Pressure, static 9
Pressure-spectrum level 15 364
Primary calculation 377—387
Propagation constant 26 308—311
Propagation, general equations 39
Propagation, sound, through gas 5
Propagation, speed, in air 10 22 24
Propagation, speed, in diaphragms 203
Propeller noise 341
Psychoacoustic criteria see "Criteria"
Psychoacoustic factors 208
Psychological studies, hearing 388—406
Psychological studies, loudspeakers 206
Psychological studies, speech intelligibility 406—417
Public-address systems see "Amplification systems"
Pulsating sphere 36—39 92—93
q see also "Directivity factor"
Q of perforated sheet 138
Q of resonant circuits 138 190
Q of sources 109—115 189
Q, of loudspeakers 189 190 229
Quartz 167
Radiation from curved sources 106—108
Radiation from doublet 97—100
Radiation from free disk 103—105
Radiation from hemispherical source 345
Radiation from linear array 93—98
Radiation from multicellular horn 107—108
Radiation from piston, baffled 101—103
Radiation from piston, baffled, free 103—105
Radiation from piston, baffled, tube 103—104
Radiation, directivity patterns 91—108 114
Radiation, from cellular horns 107—108
Radiation, from spherical source 36—39 92 345
Radiation, impedances 116—128 216
Radiation, impedances, free-disk 128
Radiation, impedances, piston, in end of tube 123—128
Radiation, impedances, piston, in infinite baffle 118—123
Radiation, impedances, spherical source 117—118
Radiation, loudspeaker 222—228 243—244
Radios, audio system 401
Radios, receivers 400
Radios, tone control 401
Random noise 393
Randomly incident sound 328 372
Rate of sound decay 304—305
Rayl 11
Reactance see "Impedances"
Reciprocity calibration, free-field 382—385
Reciprocity calibration, pressure 385—387
Reciprocity principle 377—378
Reciprocity theorem 379—381
Reciprocity, auxiliary transducer 383—387
Reciprocity, self- 382—383
Recorders, graphic-level 363
Recorders, magnetic-tape 363
Recording of signals 363
Recording, of data 374—376
Reduction, noise, coefficients of 303 see
Reference intensity 13
Reference loudspeaker response 193 194 246
Reference power 14
Reference power available efficiency 193
Reference sound pressure 13 194 246
Reissner's membrane 391
Relations, general acoustical 39
Relative humidity see "Humidity"
Resistance, acoustic 65—66 133—136
Resistance, flow 219
Resistance, fluid 55 134
Resistance, frictional 54
Resistance, lined box, closed 216—221
Resistance, mechanical 54
Resistance, radiation 116—128 216 243
Resistance, screens 134—135
Resistance, viscous 54 134
Resistance, voice-coil 214
Resistivity, crystals 173
Resistivity, metals 197
Resistivity, wire 196—197
Resonance curve 292
Resonance frequency 215 229 244—247
Resonance, basilar membrane 392
Resonance, circuit 83
Resonance, diaphragm 199—200
Resonance, ear 392
Resonance, rim 199—200
Resonance, room 286—293
Resonance, transverse 287
Resonators, Helmholtz 69
Response, filters 353—360
Response, loudspeakers 189—192 225—227 246—253
Response, loudspeakers, horn 263—266
Response, microphones 156 164 379 385
Response, mufflers 353—360
Response, sound-level meters 372—373
Response, transducers 379—381
Responsiveness, acoustic 65—66
Responsiveness, mechanical 54
Reverberant sound 311—314 318 321
Reverberant-energy density 311—313
| Reverberation time, definition 306
Reverberation time, enclosures 306—311
Reverberation time, living rooms 205—206
Reverberation time, optimum 425
Ribbon microphones, circuit 179
Ribbon microphones, directivity 180
Ribbon microphones, frequency response 180
Ribbon microphones, low-frequency boost 38—39 148—149 178
Ribbon microphones, structure 178—179
Rim construction, loudspeakers 198
Rim resonance, loudspeakers 199—200
Rochelle salt, Bimorphs 170—173
Rochelle salt, crystal structure 164
Rochelle salt, general 164—174 363
Rochelle salt, humidity 167 174
Rochelle salt, long cables 371
Rochelle salt, microphones 164—174 370—371
Rochelle salt, nonlinear distortion 173
Rochelle salt, normalcy tests 174
Rochelle salt, plates, expander 166—170
Rochelle salt, plates, shear 165—166
Rochelle salt, properties 167
Rochelle salt, resistivity 173
Rochelle salt, self-noise 173
Rochelle salt, temperature effects 167—174 370—371
Room constant, definition 312
Room constant, optimum 425—427
Room constant, typical 316
rooms see "Auditoriums" "Enclosures"
Rotational systems and analogies 67
Sabin 305
Schematic diagrams, conventions 48—52
Schematic diagrams, definition 47
Self-noise in microphones 174
Self-reciprocity 382—383
Shear plates 165—166
Sheepskin 200—201
Sheets, perforated 138—139
Sheets, sinusoidal absorbent 358—359
Side lobe 96
Silencers 353—360
Simple source 91—93 367
Slit, impedance 135—136
Solutions to wave equation, one-dimensional 23—36
Solutions to wave equation, plane wave 35—36
Solutions to wave equation, rigidly closed tube 28—35
Solutions to wave equation, spherical 36—39
Solutions to wave equation, steady-state 25—28
Sone 401
Sound absorption in materials 299—305
Sound absorption, coefficients 299—305
Sound absorption, in air 307—311 345—346
Sound coefficients 299—305
Sound energy, density 12
Sound energy, flux 11—12
Sound level 11—15
Sound level, intensity 12—14
Sound level, pressure 13 15
Sound meters, level 15 372—373
Sound meters, pressure 26 362—365 372—373
Sound, definition 3
Sound, diffuse field 298
Sound, direct 311 317 320
Sound, dispersion 25
Sound, intensity 11—12
Sound, pressure 5 9
Sound, propagation 9
Sound, reverberant 311—314 318 321
Sound, sources 338—344
Sound, speed 7 10 22 24 203
Sound, transmission 324—331 345—346
Sound-amplification systems see "Amplification systems"
Soundstream absorber 358—359
Source function 91—93 367
Sources, acoustic 66—67 91—115
Sources, curved-line 106—108
Sources, directional 316—321 367—369
Sources, doublet (dipole) 97—100
Sources, horn 108
Sources, infinite-impedance 49 51
Sources, large 321—322
Sources, linear array 96—97
Sources, mechanical 55—56
Sources, megaphone 106—108
Sources, piston, in end of tube 103—104
Sources, piston, in infinite baffle 101—103 105—106
Sources, piston, without baffle 103—105
Sources, rooms, inside 291 313—322
Sources, simple (point) 91—93 367
Sources, strength 93
Sources, table of 51
Sources, two simple in-phase 93—96
Sources, zero-impedance 49—51
Specific acoustic impedance, definition 11
Specific acoustic impedance, plane wave 35
Specific acoustic impedance, rigidly closed tube 32—35
Specific acoustic impedance, spherical wave 36
Specific heat of air 19
Spectrum level, measurement 364
Spectrum level, power 15 334
Spectrum level, pressure 15 364
Speech amplification systems see "Amplification systems"
Speech, articulation index 408
Speech, articulation index, levels 410
Speech, articulation index, peak and minimum 408
Speech, direct 409
Speech, directivity patterns 343
Speech, intelligibility 406—417
Speech, levels, power 338
Speech, levels, range 338 407—408
Speech, reverberant 410
Speech, spectrum 338 407—408
Speech-level range 338 407—408
Speed of sound, air 7 10 22 24
Speed of sound, diaphragms 203
Spherical sources, properties 91—93 367
Spherical sources, radiation 345
Spherical sources, radiation, impedance 117—118
Spherical wave 36—39
Standing wave 286
Stationary wave 28—35 286
Steady state 25—26 39 49 291—293 311—322
Stiffness (reciprocal of compliance) see "Compliance"
Strength of simple source 93
Subjective judgments, loudspeakers 205
Suspension, compliance 215 230
Symbols, meaning of 49—50
Synthetic bass 404
Tables (selected), absorption coefficients 300—301
Tables (selected), acoustical relations 39
Tables (selected), building materials, densities 328
Tables (selected), building materials, weights 328
Tables (selected), coefficients of absorption 300—301
Tables (selected), conversion factors 464—467
Tables (selected), conversion, from mobility to impedance analogies 51
Tables (selected), conversion, of octave-band levels, to critical-band levels 366
Tables (selected), conversion, of octave-band levels, to spectrum levels 364 see
Tables (selected), criteria for noise control 427
Tables (selected), damage-to-hearing risk criteria 416
Tables (selected), decibel conversion 455—463
Tables (selected), directivity factors 319
Tables (selected), energy and power in elements 81
Tables (selected), frequency bands of 300-mels width 403
Tables (selected), general acoustical relations 39
Tables (selected), mel bands of 300-mels width 403
Tables (selected), metals, density 197
Tables (selected), metals, resistivity 197
Tables (selected), noise-control criteria 427
Tables (selected), piezoelectric substances 167
Tables (selected), power and energy in elements 81
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