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Sound Levels
Decibels (dB) are most commonly used as a measure of sound level, but they are also used in electronics, signals and communications...more
The Decibel Scale
Gives an approx of human perception of loudness. This is because the human ear has a logarithmic response to changes in sound level...more
Part L1B
Conservation of fuel and power in Existing Dwellings
Part F Ventilation Testing Quote in Manor Park
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