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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
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
Part L1A
Conservation of fuel and power IN NEW DWELLINGS
Guidance for compliance with the Building Regulations for building work to New Dwellings.
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In Area D
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