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Good Hearing?
A typical person with good hearing can hear from about 20Hz to 20kHz (the audio bandwidth). A person's voice will usually range from 500Hz to 2kHz...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 L2A
Conservation of fuel and power in new buildings other than dwellings.

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EPC Ratings can also be known as:
EPC Rating, Non Domestic EPC, Commercial EPC Rating, Office EPC, CEPC, Industrial EPC, Commercial EPC, Building EPC,
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