... to that of the two canteens, 'Mezzanine' and 'Mithras House'), yet require artificial lighting to be on all day. Illuminance is the quotient of the luminous flux incident on an element of the surface containing a point by the area of that element. Luminance is the flux of light energy emerging in a small solid angle in given direction form a small element of an area on the surface per unit apparent area per unit solid angle. Noise Environment In general it is believed that most noise to buildings comes from the ambient external environment. Noises can be divided into constant and variable noises. Constant noises can be pumping, ventilation, kitchen machinery, or any thing that will be constantly working. To evaluate noise one must understand the character of the noise to be assessed. I.e. constant/variable. Acoustical Standardisation Internationally is the responsibility of the International Standards Organisation. In modern buildings about 30 types of noise generating ...

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