ISBN-10:
082470701X
ISBN-13:
2900824707018
Pub. Date:
01/01/2003
Publisher:
Taylor & Francis
Industrial Noise Control And Acoustics / Edition 2003

Industrial Noise Control And Acoustics / Edition 2003

by Randall F. Barron
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Product Details

ISBN-13: 2900824707018
Publisher: Taylor & Francis
Publication date: 01/01/2003
Series: Mechanical Engineering Series
Edition description: New Edition
Pages: 552
Product dimensions: 6.00(w) x 1.25(h) x 9.00(d)

Table of Contents

Prefaceiii
1Introduction1
1.1Noise Control1
1.2Historical Background3
1.3Principles of Noise Control7
1.3.1Noise Control at the Source8
1.3.2Noise Control in the Transmission Path9
1.3.3Noise Control at the Receiver9
References10
2Basics of Acoustics12
2.1Speed of Sound12
2.2Wavelength, Frequency, and Wave Number13
2.3Acoustic Pressure and Particle Velocity15
2.4Acoustic Intensity and Acoustic Energy Density17
2.5Spherical Waves21
2.6Directivity Factor and Directivity Index24
2.7Levels and the Decibel27
2.8Combination of Sound Sources31
2.9Octave Bands33
2.10Weighted Sound Levels34
Problems37
References40
3Acoustic Measurements41
3.1Sound Level Meters42
3.2Intensity Level Meters46
3.3Octave Band Filters49
3.4Acoustic Analyzers50
3.5Dosimeter50
3.6Measurement of Sound Power51
3.6.1Sound Power Measurement in a Reverberant Room52
3.6.2Sound Power Measurement in an Anechoic or Semi-Anechoic Room58
3.6.3Sound Power Survey Measurements62
3.6.4Measurement of the Directivity Factor66
3.7Noise Measurement Procedures69
Problems73
References76
4Transmission of Sound78
4.1The Wave Equation78
4.2Complex Number Notation83
4.3Wave Equation Solution84
4.4Solution for Spherical Waves88
4.5Changes in Media with Normal Incidence91
4.6Changes in Media with Oblique Incidence96
4.7Sound Transmission Through a Wall101
4.8Transmission Loss for Walls107
4.8.1Region I: Stiffness-Controlled Region108
4.8.2Resonant Frequency111
4.8.3Region II: Mass-Controlled Region112
4.8.4Critical Frequency113
4.8.5Region III: Damping-Controlled Region113
4.9Approximate Method for Estimating the TL117
4.10Transmission Loss for Composite Walls120
4.10.1Elements in Parallel121
4.10.2Composite Wall with Air Space122
4.10.3Two-Layer Laminate127
4.10.4Rib-Stiffened Panels131
4.11Sound Transmission Class134
4.12Absorption of Sound139
4.13Attenuation Coefficient143
Problems153
References160
5Noise Sources162
5.1Sound Transmission Indoors and Outdoors162
5.2Fan Noise164
5.3Electric Motor Noise169
5.4Pump Noise171
5.5Gas Compressor Noise173
5.6Transformer Noise177
5.7Cooling Tower Noise178
5.8Noise from Gas Vents182
5.9Appliance and Equipment Noise185
5.10Valve Noise186
5.10.1Sources of Valve Noise186
5.10.2Noise Prediction for Gas Flows188
5.10.3Noise Prediction for Liquid Flows190
5.11Air Distribution System Noise192
5.11.1Noise Attenuation in Air Distribution Systems193
5.11.2Noise Generation in Air Distribution System Fittings195
5.11.3Noise Generation in Grilles198
5.12Traffic Noise207
5.13Train Noise211
5.13.1Railroad Car Noise211
5.13.2Locomotive Noise213
5.13.3Complete Train Noise214
Problems217
References222
6Acoustic Criteria225
6.1The Human Ear226
6.2Hearing Loss229
6.3Industrial Noise Criteria231
6.4Speech Interference Level235
6.5Noise Criteria for Interior Spaces238
6.6Community Reaction to Environmental Noise243
6.7The Day-Night Level247
6.7.1EPA Criteria247
6.7.2Estimation of Community Reaction250
6.8HUD Criteria253
6.9Aircraft Noise Criteria255
6.9.1Perceived Noise Level256
6.9.2Noise Exposure Forecast257
Problems262
References267
7Room Acoustics269
7.1Surface Absorption Coefficients269
7.1.1Values for Surface Absorption Coefficients269
7.1.2Noise Reduction Coefficient270
7.1.3Mechanism of Acoustic Absorption271
7.1.4Average Absorption Coefficient274
7.2Steady-State Sound Level in a Room274
7.3Reverberation Time281
7.4Effect of Energy Absorption in the Air289
7.4.1Steady-State Sound Level with Absorption in the Air289
7.4.2Reverberation Time with Absorption in the Air291
7.5Noise from an Adjacent Room293
7.5.1Sound Source Covering One Wall293
7.5.2Sound Transmission from an Adjacent Room295
7.6Acoustic Enclosures299
7.6.1Small Acoustic Enclosures300
7.6.2Large Acoustic Enclosures304
7.6.3Design Practice for Enclosures311
7.7Acoustic Barriers312
7.7.1Barriers Located Outdoors313
7.7.2Barriers Located Indoors317
Problems321
References328
8Silencer Design330
8.1Silencer Design Requirements330
8.2Lumped Parameter Analysis332
8.2.1Acoustic Mass332
8.2.2Acoustic Compliance335
8.2.3Acoustic Resistance338
8.2.4Transfer Matrix339
8.3The Helmholtz Resonator341
8.3.1Helmholtz Resonator System341
8.3.2Resonance for the Helmholtz Resonator342
8.3.3Acoustic Impedance for the Helmholtz Resonator343
8.3.4Half-Power Bandwidth344
8.3.5Sound Pressure Level Gain348
8.4Side Branch Mufflers350
8.4.1Transmission Loss for a Side-Branch Muffler351
8.4.2Directed Design Procedure for Side-Branch Mufflers357
8.4.3Closed Tube as a Side-Branch Muffler361
8.4.4Open Tube (Orifice) as a Side Branch365
8.5Expansion Chamber Mufflers368
8.5.1Transmission Loss for an Expansion Chamber Muffler368
8.5.2Design Procedure for Single-Expansion Chamber Mufflers371
8.5.3Double-Chamber Mufflers373
8.6Dissipative Mufflers377
8.7Evaluation of the Attenuation Coefficient381
8.7.1Estimation of the Attenuation Coefficient381
8.7.2Effective Density383
8.7.3Effective Elasticity Coefficient384
8.7.4Effective Specific Flow Resistance385
8.7.5Correction for Random Incidence End Effects387
8.8Commercial Silencers389
8.9Plenum Chambers391
Problems397
References405
9Vibration Isolation for Noise Control406
9.1Undamped Single-Degree-of-Freedom (SDOF) System407
9.2Damped Single-Degree-of-Freedom (SDOF) System410
9.2.1Critically Damped System411
9.2.2Over-Damped System412
9.2.3Under-Damped System412
9.3Damping Factors413
9.4Forced Vibration419
9.5Mechanical Impedance and Mobility424
9.6Transmissibility427
9.7Rotating Unbalance431
9.8Displacement Excitation436
9.9Dynamic Vibration Isolator439
9.10Vibration Isolation Materials446
9.10.1Cork and Felt Resilient Materials446
9.10.2Rubber and Elastomer Vibration Isolators450
9.10.3Metal Spring Isolators457
9.11Effects of Vibration on Humans464
Problems469
References474
10Case Studies in Noise Control475
10.1Introduction475
10.2Folding Carton Packing Station Noise476
10.2.1Analysis476
10.2.2Control Approach Chosen479
10.2.3Cost479
10.2.4Pitfalls480
10.3Metal Cut-Off Saw Noise480
10.3.1Analysis480
10.3.2Control Approach Chosen481
10.3.3Cost482
10.3.4Pitfalls482
10.4Paper Machine Wet End482
10.4.1Analysis483
10.4.2Control Approach Chosen487
10.4.3Cost487
10.4.4Pitfalls488
10.5Air Scrap Handling Duct Noise488
10.5.1Analysis488
10.5.2Control Approach Chosen491
10.5.3Cost492
10.5.4Pitfalls492
10.6Air-Operated Hoist Motor492
10.7Blanking Press Noise494
10.7.1Analysis495
10.7.2Control Approach Chosen497
10.7.3Cost497
10.7.4Pitfalls497
10.8Noise in a Small Meeting Room498
10.8.1Analysis499
10.8.2Control Approach Chosen502
10.8.3Cost503
10.8.4Pitfalls503
Problems503
References504
Appendix APreferred Prefixes in SI506
Appendix BProperties of Gases, Liquids, and Solids507
Appendix CPlate Properties of Solids509
Appendix DSurface Absorption Coefficients510
Appendix ENomenclature514
Index525

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