A sound solution for a rail corridor

In order to reduce noise transmission, Hebel SoundBarrier was successfully adopted throughout the Upper Hunter freight corridor.

Project Overview

During 2012 it was identified that due to system-wide congestion issues it would not be possible for the coal chain to handle the conditional volumes of coal contracted by producers.

These contracted volumes by the Hunter Valley Coal Chain Coordinator (HVCCC) in conjunction with the Australian Rail Track Corporation (ARTC) were in excess of 150mtpa (million tons per annum) with forecasts to reach 206mtpa by 2019. To help meet the growing demand, rail speed and frequency of movements needed to increase, which would also increase noise emissions impacting townships along the rail corridor.

In order to reduce the noise transmission, a noise mitigation strategy was implemented and Hebel SoundBarrier was successfully adopted throughout the Upper Hunter freight corridor to reduce noise. The design, supply and installation of a Hebel noise wall, with Reapor absorbency panels in sections, was undertaken in the Gunnedah rail corridor, including feature walls sympathetic to characteristics of the Gunnedah environment.


Hebel SoundBarrier in a horizontal panel formation was specified due to its ease and speed of construction, capability to reduce acoustic transmission and ability to incorporate the routed designs specified in the brief. Hebel is a durable noise attenuation wall, which when used with Reapor, addresses high frequency noise emissions. Features were also incorporated on noise walls three and four to enhance the visual amenity of the community.

Products and applications

Hebel SoundBarrier - horizontal panel construction, incorporating enclosed steel column construction, with a SoundBarrier acoustic panel system facing source.


Hebel is lightweight, easy to handle and fast to install which enabled the project to be completed in a timely and efficient manner in accordance with the program of works. The installation of Hebel SoundBarrier throughout the Gunnedah Rail Corridor reduced the noise pollution caused by trains entering and exiting Gunnedah.