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Topics covered in Guide B4: Noise and vibration control for building services systems include:​
Mechanisms of noise generation, noise sources and transmission paths
Summary of noise and vibration problems from HVAC
Typical sources of HVAC noise and their characteristics
Transmission paths
Control of the transmission paths
Noise sources in building services
High velocity/high pressure terminal units
Grilles and diffusers
Fan coil units
Induction units
Air conditioning units
Fan-assisted terminal units
Rooftop units/air handling units
Acoustic louvres
Chillers and compressors
Heat rejection and cooling towers
Chilled ceilings
Electric motors
Noise from water flow systems
Noise control in plant rooms
Risk of noise induced hearing loss
Breakout noise from plant rooms
Break-in noise in plant rooms
Estimation of noise levels in plant rooms
Airflow noise – regeneration of noise in ducts
Flow rate guidance
Prediction techniques
Damper noise
Turbulence-induced noise in and from ductwork
Control of noise transmission in ducts
Duct components
Unlined straight ducts
Lined straight ducts
Duct bends
Duct take-offs
End reflection loss
Passive attenuators and plenums
Active attenuators
Use of fibrous sound absorbing materials in ducts
Duct breakout noise
Duct break-in noise
Attenuator noise break-in
Room sound levels
Behaviour of sound in rooms
Determination of sound level at a receiver point
Source directivity
Sound transmission between rooms
Privacy and cross talk
Transmission of noise to and from the outside
Transmission of noise to the outside and to other rooms
Transmission of external noise to the inside
Naturally ventilated buildings
Criteria for noise from building services systems
Choosing noise criteria parameters
Design criteria
Using dBA, dBC, NR and NC levels
Noise prediction of sound pressure levels from building services
Room effect
System noise
Breakout/break-in noise
Noise propagation to outdoors
Vibration problems and control
Fundamentals of vibration and vibration control
Rating equipment for vibration emission
Vibration isolation criteria
Common types of vibration isolator
Practical examples of vibration isolation
Noise in HVAC systems
Vibration in HVAC systems
Explanation of some basic acoustic concepts
Regeneration of noise by duct components and terminations
Interpreting manufacturers’ noise data
Noise instrumentation
Vibration instrumentation
Uncertainty in measurement and prediction of sound levels and sound power levels
Application of noise prediction software and integrated building design processes

Guide B4 Noise and vibration control for building services systems (2016)

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  • Publisher CIBSE Status – – – № of pages 121 Publication Date Jun 2016 ISBN 9781906846794
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