Architectural Acoustics Theory and Practice

Architectural Acoustics Theory and Practice

Architectural Acoustics Theory and Practice

The aim of this assignment is to bring together the theory and practice of architectural
acoustics which were presented to you during NEA4204, as they relate to a small office
upgrade. It will build on the homework tasks to create a single technical report of an office
upgrade to a professional standard.
A real location will be considered and the planning impacts, room acoustics, noise ingress
and down-duct noise will be assessed.
As a result of your analysis, you will make recommendations which will influence the
impact of the HVAC upgrade to nearby affected receptors and workers within the existing
building.

1.0 INTRODUCTION
Your client is a hardware wholesaler with a warehouse and office in Croydon,
about 30km outside Melbourne. At present, the office does not have central
HVAC plant, instead they are using small packaged units, and portable heaters
and air conditioners. This year they have had funding approval to upgrade to a
packaged HVAC unit, which is ultimately expected to save money on operating
cost and improve comfort in the office. In addition, they will be installing a backup
generator to service the new plant in an emergency.
The proposed locations for the plant are:
• HVAC unit at the south end of the carpark
• Generator to the south of the warehouse
Finally, the client is considering changing from open plan office to a mixture of
open plan and private offices. In keeping with their company policy, new fit-out
works are to comply with the WELL building standard.
2.0 ASSIGNMENT
As the acoustic engineer on the project, you will need to ensure that the impact
of the proposed mechanical plant is kept to within acceptable limits and that the
client aspiration of WELL certification can be met.
2.1 IMPACT TO NEARBY PROPERTIES
To obtain planning permission, you will need to demonstrate that the proposed
plant will comply with noise limits applicable to the site.
This will include:
• Determining site-specific noise limits
• Assessing the HVAC plant against the determined limits
• Making recommendations for an enclosure (if required)
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2.2 IMPACT WITHIN THE OFFICE
You will need to assess the impact of the plant on the office workers to ensure that
office conditions are both tenable and appropriate for a work environment. You
will also need to ensure that both the new private offices and open plan office
meet all applicable criteria.
This will include:
• Determining reverberation, noise level, and acoustic separation criteria
• Identifying potential sound transmission paths
• Assessing the architectural design and HVAC noise against the criteria
• Making recommendations about room finishes, duct treatment, and
partition buildups

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