Noise Control

Section 1: Noise basics
1.1 Introduction
1.2 The nature of sound
1.3 Power, pressure and intensity
1.4 The decibel and weighting
1.5 Adding sound levels
1.6 Summary
Section 2: Analysing sounds
2.1 Introduction
2.2 Analysing steady sounds
2.3 Point sources and line sources
2.4 Directionality
2.5 Sound power level
2.6 Sound in rooms: reverberation and absorption
2.7 Analysing unsteady sounds
2.8 Summary
Section 3: Outdoor sound
3.1 Introduction
3.2 Geometric divergence (Adiv)
3.3 Atmospheric absorption (Aatm)
3.4 Ground absorption (Aground)
3.5 Barriers (Abar)
3.6 Other factors
3.7 Transport noise
3.8 Summary
Section 4: Noise control at source
4.1 Introduction
4.2 Choosing which source to control
4.3 Control of noise by design or choice of process
4.4 Isolating structure-borne vibration
4.5 Enclosures
4.6 Frequency dependence of noise reduction
4.7 Summary
Section 5: Control between source and receiver
5.1 Introduction
5.2 Active noise control
5.3 Indirect sound paths
5.4 Absorption and absorbing materials
5.5 Barriers
5.6 Summary
Section 6: Control at the receiver
6.1 Introduction
6.2 Sound insulation of dwellings
6.3 Ear protection
6.4 Summary
Glossary
References
Acknowledgements