Engineering Acoustics. Malcolm J. Crocker

Control 13.7 Sound Attenuation in Ventilation Systems 13.8 Sound Generation in Mechanical Systems 13.9 Radiated Noise References

      21  14 Surface Transportation Noise and Vibration Sources and Control 14.1 Introduction 14.2 Automobile and Truck Noise Sources and Control 14.3 Interior Road Vehicle Cabin Noise 14.4 Railroad and Rapid Transit Vehicle Noise and Vibration Sources 14.5 Noise And Vibration Control in Ships References

      22  15 Aircraft and Airport Transportation Noise Sources and Control 15.1 Introduction 15.2 Jet Engine Noise Sources and Control 15.3 Propeller and Rotor Noise Sources and Control 15.4 Helicopter and Rotor Noise 15.5 Aircraft Cabin Noise and Vibration and Its Control 15.6 Airport Noise Control References

      23  16 Community Noise and Vibration Sources 16.1 Introduction 16.2 Assessment of Community Noise Annoyance 16.3 Community Noise and Vibration Sources and Control 16.4 Environmental Impact Assessment 16.5 Environmental Noise and Vibration Attenuation 16.6 City Planning for Noise and Vibration Reduction and Soundscape Concepts References

      24  Glossary References

      25  Index

      26  End User License Agreement

      List of Tables

      1 Chapter 1Table 1.1 Preferred center frequencies for noise measurements according to IS...

      2 Chapter 3Table 3.1 Models of idealized spherical sources: Monopole, Dipole, and Quadru...Table 3.2 Simple source near reflecting surfaces^a.Table 3.3 Frequencies (less than 100 Hz) for a 3.1 × 4.7 × 6.2 m³ rectangular...

      3 Chapter 4Table 4.1 Octave band levels of factory noise and Stevens' loudness indices.Table 4.2 Combination of octave‐band sound pressure levels of factory noise t...Table 4.3 Male voice speech sound pressure levels +12 dB at 1 m from lips for...

      4 Chapter 5Table 5.1 Effects of noise on health and wellbeing with sufficient evidence [...Table 5.2 Estimated excess risk of incurring material hearing impairment^a as ...Table 5.3 Time‐Weighted Average (TWA) noise level limits as a function of ...Table 5.4 Worker's A‐weighted noise level exposure record.Table 5.5 One‐octave‐band factory noise.Table 5.6 ACGIH recommended threshold limit values for hand‐transmitted vibra...

      5 Chapter 6Table 6.1 Some acoustical and nonacoustical factors that contribute to annoya...Table 6.2 Sound level values for Example 6.1.Table 6.3 Data used in Example 6.8.Table 6.4 Recommended values of NCB curves for different uses of spaces in bu...Table 6.5 Guidelines from EPA [31], WHO [68], FICON [33], and various Europea...Table 6.6 Guidelines used in the United Kingdom for A‐weighted equivalent sou...Table 6.7 Vibration dose values (ms^−7/4) at which various degrees of ad...

      6 Chapter 8Table 8.1 Sound power measurement by pressure vs. intensity techniques in var...Table 8.2 Comparison of overall sound power levels obtained by the sound inte...

      7 Chapter 9Table 9.1 Passive noise control approaches that may be considered for source,...Table 9.2 Different formulas for the end correction factor.P is the open area...Table 9.3 Sound absorption coefficientα(f) and corresponding NRC of comm...Table 9.4 Change in noise reduction performance of enclosure as function of p...Table 9.5 Effectiveness of a partial enclosure.

      8 Chapter 10Table 10.1 Basic elements and corresponding muffler components of two‐duct mo...Table 10.2 Basic elements and corresponding muffler components for three‐duct...Table 10.3 Symbols used by various authors in parallel‐baffle mufflers.Table 10.4 Calculated values of muffler attenuation from methods given in Sec...

      9 Chapter 11Table 11.1 Effects of different gear design and manufacturing parameters on g...Table 11.2 Specific sound power levels, dB, in eight lowest one‐octave bands ...Table 11.3 Main sources of noise in electric motors [18].Table 11.4 One‐octave band level adjustments (dB) for small electric motors [...Table 11.5 One-octave band level adjustments (dB) for exterior noise levels r...Table 11.6 Prediction of the A‐weighted sound power level generated by differ...

      10 Chapter 12Table 12.1 Representative transmission and impact isolation class data for wa...Table 12.2 Criteria for airborne sound insulation of wall partitions between ...Table 12.3 Criteria for airborne and impact sound insulation of floor/ceiling...Table 12.4 Criteria for airborne sound insulation within a dwelling unit.Table 12.5 Calculation of minimum partitionTL required to achieving NC‐40 in ...Table 12.6 Human acceleration acceptability criteria.

      11 Chapter 13Table 13.1 Fan efficiency adjustment, i.e. the number of decibels by which th...Table 13.2 Estimated sound power level increases for different fan pressures ...Table 13.3 Fan sound power frequency spectrum corrections in dB [8].Table 13.4 Graham and Hoover calculation of the one‐octave band sound power o...Table 13.5 Fry calculation of the sound power levels, dB, of FC and BI fans.Table 13.6 Poor intake and discharge condition corrections [8].Table 13.7 Calculation of natural frequencyf_n and static deflection needed to...Table 13.8 Recommended minimum static deflections for vibration isolators use...Table 13.9 Comparison of material used for vibration isolators [27].Table 13.10 Predicted attenuation