Environmental Acoustics / Noise


Noise sources from road, rail, aeroplanes, industry and entertainment facilities all count as sources of environmental noise. Rated according to their own international (ISO) and national (BS) standards, it is an area of acoustics that is taken very seriously.<br />
To monitor and assess environmental noise, complex systems of monitoring and prediction are used to interpret existing scenarios as well as the likely change / increase due to development and expansion, and their likely environmental impact on local communities.</p>
<p>Commonly used descriptors for defining environmental noise are the L<font size=”1″>Aeq,T</font>,L<font size=”1″>90,T</font>, and L<font size=”1″>10,T</font>. The L<font size=”1″>Aeq,T</font> is defined as “the value of the A-weighted sound pressure level of a continuous, steady sound that, within a specified time interval T, has the same mean square sound pressure as a sound under consideration whose level varies with time.”
The L<font size=”1″>90,T</font> is a measure of the level of sound exceeded over 90 percent of a period of time, T.<br />
Similarly with L<font size=”1″>10,T</font> this is the level exceeded 10 percent of a period of time.</p>
<p><strong>Recent projects include:</strong><br />
Guru Nanak Sikh VA Secondary School (pictured, below)<br />
Langley Grammer School, Slough<br />
Stamford Endowed Schools, Lincs<br />

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