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Beyond the Decibel: Why Solving SA’s Noise Problems Requires Listening to Frequency
In South African construction, when specifying acoustic performance, the conversation often starts and ends with decibels (dB). A project brief will demand “a 25 dB reduction” or compliance with a “45 dB(A) ambient limit.” While this is an essential starting point, relying solely on a single dB figure is like prescribing medicine based only on a fever reading—it misses the critical diagnosis of what is making the noise, and how to treat it effectively. In acoustics, this is the difference between broadband sound pressure level and frequency-resolved analysis.