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![Did you know Welwyn_Garden_City](/images/didyouknow.png)
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
![Did you know Welwyn_Garden_City](/images/didyouknow.png)
How loud is too loud?
Noise above 85 dBA over time will cause hearing loss. In general, the louder the noise, the less time required before hearing loss...more
Part L1A
Conservation of fuel and power IN NEW DWELLINGS
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Low Zero Carbon Reports Quote in Welwyn Garden City
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