Sherwood Colliery

Top of the Third Drift Intake looking towards the Manrider Engine (1991)
This shows the Acoustic Barrier constructed to reduce the noise levels to the men waiting to travel inbye.

Inside the Acoustic Barrier; this barrier had an unexpected benefit, not only did it reduce the noise levels by 12dB
It also increased the comfort of the men.
By attaching a door at the outbye end it reduced the velocity of the cold intake air passing through it.

Paul Hubbard (Group Noise Control Engineer) and myself at the inbye end of the acoustic barrier.
This barrier was an idea that I had following the success of a trial elsewhere in the mine; it was constructed of 4"x2" timbers with wood-wool slabs attached to each side, in-filled with rockwool and the outer surface's plastered with hardstop.