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Noise enclosures, either full or partial are often required when roads or rail lines pass through areas with a high density of noise sensitive receivers. This is particularly the case in Hong Kong.

In 2003 SONOTEC carried out a noise enclosure project for the Mass Transit Railway Corporation (MTR) West Rail Line in Hong Kong (formerly known as KCRC). This new line not only ran through several residential areas but also passed close to a hospital. For these reasons the contract specification carried very onerous noise mitigation requirements, particularly for Sound Transmission Loss at the low frequencies - 38dB at 125Hz.

Our alternative design which replaced the concrete and cementitious products with a composite aluminium panel proved so popular that it was adopted at a further two locations along the viaduct.

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