The development at Letchworth comprised 250 residential units on land surrounded by industrial premises including a chemical processing plant and an industrial laundry.
In accordance with Local Authority requirements, detailed noise surveys were undertaken to establish the content and variation in ambient noise levels. A calibrated computer model was developed for the site enabling the Noise Exposure Category boundaries to be derived.
Given the industrial nature of the ambient noise, both Leq and Lmax noise levels were considered and used to identify appropriate mitigation measures in the form of building layout and orientation, noise barriers and glazing specifications.
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