DEICON implemented an air‑isolation vibration control system to dramatically reduce transformer hum in a 3300 KVA transformer installed on the penthouse level of a 16‑story corporate office building. The transformer’s tonal noise—primarily caused by magnetostriction of the core laminates, producing strong vibrations at 120 Hz and its harmonics—was transmitting through the floor into executive office spaces below.
To solve this, DEICON isolated the transformer’s core and coils from the supporting structure using air springs, which offer excellent low‑frequency vibration isolation and high load‑bearing capability with minimal static deflection. After installation, measurements showed a drastic reduction in vibration transmission, with clear differences between acceleration levels on the transformer side and the floor side of the isolators. Follow‑up noise measurements confirmed a corresponding reduction in structure‑borne noise within the occupied spaces below.
This project demonstrates how air‑spring isolation can effectively abate transformer hum in sensitive environments, ensuring quiet, comfortable workspaces even in buildings housing large electrical equipment.
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