With the expansion of residential developments and the consequential reduction in available land, the distance between electrical substations and homes in many
locations is shrinking.

Homeowner expectations of ‘quiet enjoyment’ are increasing and the 100 Hz resonance hum from poorly baffled substations is increasingly leading to homeowner
discomfort and in some cases, civil complaints. After extensive research and acoustic testing, Hebel Australia has developed the Slatted Resonator Wall system that

provides a resonant frequency barrier under 150 Hz – far lower than other available systems.

Performance down to 100 Hz has also been achieved. The result is exceptional and predictable acoustic absorption with elimination of resonant noise at very
close distances to the source.