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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

Point of Reference
10 dBA is the sound level of normal human breathing. To put it into perspective, thunder is a whopping 120 dBA...more
Part L1B
Conservation of fuel and power in Existing Dwellings

Our other services include:
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CSH can also be known as:
Code for Sustainable Homes, Code Assessment, C4SH, Sustainable Homes, Code for Sustainable Homes Daylight Calculation,
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