Industrial Noise & Vibration Centre

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Massive Axial Fan Noise Reduction – at seriously little cost

Steelworks axial extract fan noise attenuation

Low frequency tonal noise from 8 architectural scale axial fans (several stories up and already fitted with 8m long silencers!) at a Tata steel-works had caused environmental noise problems over a number of years. We diagnosed, we tweaked – and the problem was solved…

All the possible conventional fan noise control solutions considered (largely additional silencers) would not only have cost a large fortune (and probably not been very effective), but would also have reduced efficiency and therefore increased the running costs. We diagnosed a system resonance which we addressed at source, reducing the tones by 20dB – and with no effect on fan efficiency.