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Acoustics in HVAC – SAIRAC looks at noise

The January technical meeting of the Johannesburg centre of the South African Institute of Refrigeration and Air Conditioning (SAIRAC) looked at the physics of acoustics, noise and noise mitigation.

The talk was held on 18 January at the usual venue, Bryanston Sports Club, and was well-attended from industry professionals young and old.

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Before handing over to the speaker, centre chairman Jaco Pieterse handled some formalities – informing guests about upcoming events and courses. He also handed out some certificates for completed courses as well as new members.

SAIRAC president, Grant Laidlaw, said a few words about the upcoming FRIGAIR 2018 expo, particularly looking at the free seminars and ASHRAE speakers booked. He urged all members to get involved and attend these exciting events.

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The floor was then given to the presenter – Klaus Weber, well-known acoustics consultant to explore the fundamentals of acoustics. Weber holds a degree in mechanical engineering from Germany and boasts almost four decades of experience.

Noise is a rather complex matter and this talk aimed to provide guests with some insight to enable them to assess in general the severity of noisy situations, to apply basic preventive and mitigation measures to avoid problems and to recognise validity of statements and comments from other parties.

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His talk was very technical in nature and he looked at how to do things right (and wrong), using practical examples to relate the science of acoustics engineering to HVAC. After a broad overview, he narrowed applications down to ducting specifically, looking at how to apply this technology in our industry.


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