Tuned at 560Hz
100m damper section
Straight Track
Booted wooden sleeper
½ damper per rail support spacing
3dB(A) Track Side Noise Reduction

Although only 5 dampers were installed, 2 dB(A) noise reduction is already achieved, measured 2.5m from the noisy side of rail (facing the rail without dampers). It is estimated that 7dB(A) in-saloon noise could be reduced if installed fully5 dB reduction at the noise peak of 800Hz.