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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 L2B
Conservation of fuel and power

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Display Energy Certificate can also be known as:
DEC,
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In County H
Display Energy Certificate in Hampshire, Display Energy Certificate in Herefordshire, Display Energy Certificate in Hertfordshire, Display Energy Certificate in Highlands and Islands,